Low-temperature adsorption device for hydrogen liquefaction

Abstract

The utility model discloses a low temperature adsorption device for hydrogen liquefaction, and the device comprises a raw material hydrogen compression and purification unit X100, a low temperature heat exchanger E100, a gas reheater E200, a low temperature adsorber A100A, a low temperature adsorber A100B, an 80K cold box X200 and a plurality of control valves which are connected with each other. The scheme can continuously and efficiently produce purified hydrogen, and has the advantages of simple process operation, safety and reliability, no nitrogen consumption, no moving equipment and low energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature adsorption technology, and in particular to a low-temperature adsorption device for hydrogen liquefaction. Background Technology

[0002] Hydrogen has a small molecular weight and low energy density per unit volume under standard conditions. Storing hydrogen in its gaseous state requires extensive high-pressure storage equipment, which is inconvenient for transportation, use, and management. Liquefaction is necessary for better hydrogen storage. Statistics show that the energy density of liquid hydrogen per unit volume is several times that of high-pressure hydrogen. Since hydrogen's boiling point is -253℃, during hydrogen liquefaction, all components except helium become solids. Nitrogen, oxygen, and argon impurities solidify on the inner surfaces of pipes and valves. Solid oxygen, in particular, is highly susceptible to reacting with hydrogen, posing an explosion risk and causing serious personal injury and property damage. Therefore, in temperature ranges above 80K, one or more stages of cryogenic adsorbers are needed in hydrogen liquefaction devices to purify the raw hydrogen, ensuring the safe and stable operation of hydrogen liquefaction energy.

[0003] Currently, research on cryogenic adsorption processes in liquid hydrogen plants is limited. Chinese patent CN 102491272 B discloses a high-purity hydrogen purification process and apparatus. The adsorption bed uses a jacketed internal heating medium to indirectly regenerate the outer wall of the adsorber, avoiding the risk of direct hydrogen contact heating. However, this requires a complex jacketed heating pipeline and is only suitable for processing small-scale gas volumes (≤3 tons / day) due to equipment structure limitations. Furthermore, it lacks a recovery unit. Chinese patent CN 113264506 A discloses a cryogenic hydrogen adsorber regeneration process for a hydrogen liquefaction plant. This process uses heated nitrogen for regeneration and requires multiple replacement and evacuation steps with a vacuum pump. These steps consume large amounts of nitrogen and hydrogen, lack a recovery unit, and result in high operating costs. It also suffers from drawbacks such as high equipment failure rates, poor safety during evacuation due to contact with hydrogen, and the risk of oxygen intake due to inadequate sealing. Chinese patent CN 114522508 B discloses a hydrogen adsorber regeneration system and method, which uses nitrogen heating after depressurization for regeneration. However, it lacks a vacuum pump, requires multiple hydrogen replacements, and the regenerated gas cannot be recovered, resulting in high operating costs. Foreign patent US3104953 employs a closed-loop, ambient-temperature hydrogen regeneration heating process. However, this closed-loop hydrogen circulation carries the risk of concentration after oxygen desorption, and the regeneration flow path is equipped with rotating equipment such as a circulating compressor and a vacuum pump. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a low-temperature adsorption device for hydrogen liquefaction, which has the advantages of wide applicability, low energy consumption, and high operability.

[0005] This utility model is achieved using the following technical solution:

[0006] A cryogenic adsorption device for hydrogen liquefaction includes a raw material hydrogen compression and purification unit X100, a cryogenic heat exchanger E100, a gas reheater E200, a cryogenic adsorber A100A, a cryogenic adsorber A100B, an 80K cold box X200, and multiple control valves connected to each other; one of the raw material hydrogen pipelines FH11 is connected to the inlet of the raw material hydrogen compression and purification unit X100, and the other is connected to the outlet of a one-way valve VM11, the inlet of which is connected to the outlet of the gas reheater E200;

[0007] The outlet pipeline FH12 of the raw material hydrogen compression and purification unit X100 is connected to the inlet of the emergency shut-off valve VM07 on one side and to the inlet of the regulating control valve VM12 on the other side. The outlet of the regulating control valve VM12 is connected to the vent pipeline.

[0008] The outlet of the emergency shut-off valve VM07 is connected to the inlet of the cryogenic heat exchanger E100. One outlet pipeline FH13 of the cryogenic heat exchanger E100 is connected to the inlet of the switch control valve VM01A, another is connected to the inlet of the switch control valve VM01B, and the third is connected to the inlet of the pressure regulating control valve VM09.

[0009] One outlet line FH14 of the switch control valve VM01A is connected to the inlet of the low-temperature adsorber A100A, and the other is connected to the switch control valve VM02A. One outlet line FH15 of the low-temperature adsorber A100A is connected to the inlet of the switch control valve VM05A, and the other is connected to the switch control valve VM04A. One outlet line of the switch control valve VM05A goes to the downstream purified hydrogen line FH19, and the other is connected to the outlet of the switch control valve VM05B. A third line is connected to the inlet of the regulating control valve VM13. One outlet line FH16 of the switch control valve VM01B is connected to the inlet of the low-temperature adsorber A100B, and the other is connected to the switch control valve VM02B.

[0010] Specifically, the outlet pipeline FH17 of the low-temperature adsorber A100B is connected in one direction to the inlet of the on / off control valve VM05B and in another direction to the on / off control valve VM04B; the outlet of the on / off control valve VM05B is connected in one direction to the downstream purified hydrogen pipeline FH19, in another direction to the outlet of the on / off control valve VM05A, and in a third direction to the inlet of the regulating control valve VM13; the medium-temperature hydrogen of the regeneration heating pipeline FH20 is connected to the inlet of the regulating control valve VM06, and the outlet of the regulating control valve VM06 is connected in one direction to the on / off control valve VM04B. A is connected to VM04B, another line is connected to the inlet of regulating control valve VM03, the third line is connected to the outlet of regulating control valve VM10, the fourth line is connected to the outlet of regulating control valve VM13, the outlet of regulating control valve VM03 is connected to the outlet of regulating control valve VM08, and another line is connected to the inlet of gas reheater E200. The ambient temperature hydrogen in regenerated cold blowing pipeline FH21 is connected to the inlet of regulating control valve VM10. The outlet of regulating control valve VM09 in precooling pipeline FH22 is connected to on / off control valves VM02A and VM02B.

[0011] Specifically, the raw material hydrogen compression and purification unit X100 incorporates one or more combinations of pressure swing adsorption, temperature swing adsorption, and membrane separation processes.

[0012] Specifically, the low-temperature heat exchanger E100 includes a wound tube heat exchanger, a printed circuit board heat exchanger, and a plate-fin heat exchanger, and the gas reheater E200 includes a shell-and-tube heat exchanger, a water bath heat exchanger, and an ambient temperature heat exchanger.

[0013] Specifically, the low-temperature adsorber A100A and low-temperature adsorber A100B are internally insulated structures, and are filled with one or more combinations of molecular sieves, activated carbon and silica gel.

[0014] Specifically, the low-temperature adsorber A100A, low-temperature adsorber A100B, low-temperature heat exchanger E100, on / off control valve VM01A, on / off control valve VM01B, on / off control valve VM02A, on / off control valve VM02B, on / off control valve VM04A, on / off control valve VM04B, on / off control valve VM05A, on / off control valve VM05B, regulating control valve VM09, and regulating control valve VM13 are all integrated into the 80K cold box X200.

[0015] Specifically, the outlet of the raw material hydrogen compression and purification unit X100 is also equipped with an oxygen content analyzer AI01, an interlocked emergency shut-off valve VM07, and a venting regulating control valve VM12; the outlets of the low-temperature adsorbers A100A and A100B are equipped with an oxygen content analyzer AI02, an interlocked emergency shut-off switch control valve VM05A and a switch control valve VM05B, an interlocked emergency venting switch control valve VM04A and a switch control valve VM04B, and a regulating control valve VM03.

[0016] Specifically, it also includes replacing the gas heater E300 with the regulating control valve VM06; in this case, the medium-temperature hydrogen heating pipeline FH20 and the regulating control valve VM06 are removed, and a new gas heater E300 is added. Room temperature hydrogen enters the gas heater E300, is heated, and then flows into the low-temperature adsorber A100A or the low-temperature adsorber A100B for regeneration heating treatment.

[0017] The beneficial effects of this utility model are as follows: Compared with the prior art, the low-temperature adsorption process of this utility model consumes no nitrogen or liquid nitrogen, achieving efficient and continuous adsorption with stable hydrogen purity; the low-temperature adsorption regeneration process has no moving equipment, the process is simple, safe and reliable, and the extraction of medium-temperature hydrogen as the heating gas does not require the consumption of a heat source, resulting in low overall operating costs and easier operation; heating and cold blowing of the gas do not require the consumption of nitrogen, and all hydrogen in the system is recycled and reused, resulting in high liquid hydrogen production rate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of a low-temperature adsorption device for hydrogen liquefaction in one embodiment of the present invention;

[0020] Figure 2 This is a structural diagram of a low-temperature adsorption device for hydrogen liquefaction in another embodiment of the present invention;

[0021] Among them, X100 is the compression purification unit, E100 is the low-temperature heat exchanger, E200 is the gas reheater, E300 is the gas heater, A100A / B is the low-temperature adsorber, X200 is the 80K cold box, VM01A / B, VM02A / B, VM04A / B, VM05A / B, VM07 are the on / off control valves, VM03, VM06, VM08, VM09, VM10, VM12, VM13 are the regulating control valves, VM11 is the one-way valve, FH11~FH19, FH20~FH22 are the fluid pipelines, AI01, AI02A / B are the trace oxygen analyzers, PI01A / B are the pressure measuring points for charging and discharging, TI01A / B are the regeneration heating and precooling temperature measuring points for the low-temperature adsorber, and TI02A / B are the adsorption temperature measuring points for the low-temperature adsorber. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] The following is in conjunction with the appendix Figure 1-2 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] This utility model discloses a low-temperature adsorption device for hydrogen liquefaction, comprising: a raw material hydrogen compression and purification unit X100, a low-temperature heat exchanger E100, a gas reheater E200, a low-temperature adsorber A100A / B, an 80K cold box X200, on / off control valves VM01A / B, VM02A / B, VM04A / B, VM05A / B, VM07, regulating control valves VM03, VM06, VM08, VM09, VM10, VM12, VM13, and a one-way valve VM11, etc. It also discloses adsorption and regeneration methods for the low-temperature adsorption device for hydrogen liquefaction, applicable to medium and large-scale hydrogen liquefaction plants. Detailed descriptions are provided below with reference to specific embodiments.

[0026] Example 1

[0027] like Figure 1 As shown, a low-temperature adsorption device for hydrogen liquefaction includes:

[0028] The system includes a raw material hydrogen compression and purification unit X100, a low-temperature heat exchanger E100, a gas reheater E200, a low-temperature adsorber A100A / B, and an 80K cold box X200. One of the raw material hydrogen pipelines, FH11, is connected to the inlet of the raw material hydrogen compression and purification unit X100, and the other is connected to the outlet of a one-way valve VM11. The inlet of the one-way valve VM11 is connected to the outlet of the gas reheater E200. One of the raw material hydrogen compression and purification unit X100 outlet pipelines, FH12, is connected to the inlet of an emergency shut-off valve VM07, and the other is connected to the inlet of a regulating control valve VM12. The outlet of the regulating control valve VM12 is connected to a vent line. The outlet of the emergency shut-off valve VM07 is connected to the inlet of the low-temperature heat exchanger E100. The low-temperature heat exchanger E100 outlet pipeline, FH13... One line connects to the inlet of the switch control valve VM01A, another line connects to the inlet of the switch control valve VM01B, and a third line connects to the inlet of the pressure regulating control valve VM09. One outlet line of switch control valve VM01A, FH14, connects to the inlet of the low-temperature adsorber A100A, and another line connects to the switch control valve VM02A. One outlet line of the low-temperature adsorber A100A, FH15, connects to the inlet of the switch control valve VM05A, and another line connects to the switch control valve VM04A. One outlet line of switch control valve VM05A goes to the downstream purified hydrogen line FH19, and the other line connects to… The outlet of the on / off control valve VM05B is connected to the third line, which is connected to the inlet of the regulating control valve VM13. One branch of the outlet line FH16 of the on / off control valve VM01B is connected to the inlet of the cryogenic adsorber A100B, and the other branch is connected to the on / off control valve VM02B. One branch of the outlet line FH17 of the cryogenic adsorber A100B is connected to the inlet of the on / off control valve VM05B, and the other branch is connected to the on / off control valve VM04B. One branch of the outlet of the on / off control valve VM05B goes to the downstream purified hydrogen line FH19, and the other branch is connected to the outlet of the on / off control valve VM05A. The third branch is connected to the regulating control... The inlet of valve VM13 is connected to the inlet of the medium-temperature hydrogen in the regenerating heating pipeline FH20, which is connected to the inlet of the regulating control valve VM06. One outlet of regulating control valve VM06 is connected to the on / off control valves VM04A / B, another to the inlet of regulating control valve VM03, a third to the outlet of regulating control valve VM10, and a fourth to the outlet of regulating control valve VM13. The outlet of regulating control valve VM03 is connected to the outlet of regulating control valve VM08, and another to the inlet of the gas reheater E200. The ambient temperature hydrogen in the regenerating cold blowing pipeline FH21 is connected to the inlet of regulating control valve VM10. The outlet of the regulating control valve VM09 in the precooling pipeline FH22 is connected to the on / off control valves VM02A / B.

[0029] In this embodiment, the raw material hydrogen compression and purification unit X100 includes one or more combinations of separation processes such as pressure swing adsorption, temperature swing adsorption, and membrane separation; the low-temperature heat exchanger E100 can be a coiled tube heat exchanger, a printed circuit board heat exchanger, or a plate-fin heat exchanger; the gas reheater E200 can be any one of a shell-and-tube heat exchanger, a water bath heat exchanger, or an ambient temperature heat exchanger; the low-temperature adsorber A100A / B is filled with one or more combinations of molecular sieves, activated carbon, and silica gel; the equipment structure is that the internally insulated low-temperature adsorber A100A / B, low-temperature heat exchanger E100, on / off control valves VM01A / B, VM02A / B, VM04A / B, VM05A / B, regulating control valves VM09 and VM13 are integrated in an 80K cold box X200; the low-temperature adsorption regeneration heating and precooling medium uses medium-temperature hydrogen and room-temperature hydrogen, wherein the medium-temperature hydrogen comes from before the compressor interstage cooler or after the steam heater.

[0030] In addition, in this embodiment, the outlet of the raw material hydrogen compression purification unit is equipped with an oxygen content analysis AI01 interlock emergency shut-off valve VM07 and a venting regulation control valve VM12; the outlet of the low-temperature adsorber A100A / B is equipped with an oxygen content analysis AI02 interlock emergency shut-off valve VM04A / B, VM05A / B and a regulation control valve VM03 to ensure the safety of the low-temperature adsorption and regeneration process.

[0031] The adsorption and regeneration process of the low-temperature adsorption device for hydrogen liquefaction proposed in this utility model is as follows:

[0032] Adsorption process using adsorber A100A as an example:

[0033] The raw material hydrogen FH11 and the regeneration flow path FH18, with a pressure of ~0.005MPa and a temperature of 20℃, enter the compression and purification unit X100 together to remove impurities. The gas FH12, with a pressure of ~2.4MPa and a temperature of 35℃, enters the low-temperature adsorber A100A in the adsorption state to remove impurities and obtain purified hydrogen.

[0034] Regeneration process using adsorber A100B as an example:

[0035] When the adsorption saturated low-temperature adsorber A100B enters the regeneration stage, the on / off control valves VM01B and VM05B are closed, and the on / off control valve VM02B and regulating control valve VM08 are opened to release the internal gas and depressurize it. The gas flows into the gas reheater E200, and after reheating, it enters the inlet of the compression purification unit X100 along with the raw material hydrogen FH11. After the pressure PI01B inside the low-temperature adsorber A100B drops to atmospheric pressure, the regulating control valve VM06 and the on / off control valve VM04B are opened to introduce medium-temperature hydrogen at a temperature of 80℃ and a pressure of 0.15MPa into the low-temperature adsorber A100B for heating. After the temperature TI01B reaches the predetermined value, the regulating control valve (VM06) of the regeneration heating pipeline FH20 is closed, and then the ambient temperature hydrogen of the regeneration cold blowing pipeline FH21 is switched on, and the regulating control valve is opened. VM10 enters the cryogenic adsorber A100B for cold blowing. After the temperature TI01B reaches 35℃, the corresponding valves VM10 and VM08 in the cold blowing pipeline are closed. Then, the regeneration precooling pipeline FH22 is connected, and the regulating control valves VM08 and VM13 are opened. The cryogenic purified hydrogen enters the cryogenic adsorber A100B for precooling, then enters the gas reheater E200 for heat exchange and temperature rise, and then flows into the raw material hydrogen pipeline FH11. After the temperature TI01B reaches -192℃, the regulating control valve VM08 and the on / off control valve VM04B of the regeneration precooling pipeline FH22 are closed. Then, the regeneration pressurization stage begins, and the regulating control valve VM09 is opened. After the pressure PI01B reaches 2.4MPa, the regulating control valve VM09 is closed, and the on / off control valve VM02B is closed. At this point, the regeneration of the cryogenic adsorber A100B is completed and it is ready for use.

[0036] The low-temperature hydrogen adsorption temperature is between -160 and -196℃, the regeneration gas inlet temperature is between -20 and 80℃, and the regeneration gas outlet temperature is between -100℃ and room temperature; the low-temperature hydrogen adsorption pressure is between 1.3 and 15 MPa, and the regeneration gas pressure is between 0 and 1.3 MPa.

[0037] Example 2

[0038] like Figure 2 As shown, compared to Example 1, the medium-temperature hydrogen heating pipeline FH20 and the regulating control valve VM06 are eliminated, and a gas heater E300 is added. Room temperature hydrogen enters the gas heater E300, is heated, and then flows into the low-temperature adsorber A100B for regeneration heating treatment.

[0039] For the foregoing embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to this application.

[0040] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be within the protection scope of the appended claims.

Claims

1. A low-temperature adsorption device for hydrogen liquefaction, characterized in that, It includes an interconnected raw material hydrogen compression and purification unit X100, a low-temperature heat exchanger E100, a gas reheater E200, a low-temperature adsorber A100A, a low-temperature adsorber A100B, an 80K cold box X200, and multiple control valves; one of the raw material hydrogen pipelines FH11 is connected to the inlet of the raw material hydrogen compression and purification unit X100, and the other is connected to the outlet of the one-way valve VM11, the inlet of the one-way valve VM11 is connected to the outlet of the gas reheater E200; The outlet pipeline FH12 of the raw material hydrogen compression and purification unit X100 is connected to the inlet of the emergency shut-off valve VM07 on one side and to the inlet of the regulating control valve VM12 on the other side. The outlet of the regulating control valve VM12 is connected to the vent pipeline. The outlet of the emergency shut-off valve VM07 is connected to the inlet of the cryogenic heat exchanger E100. One outlet pipeline FH13 of the cryogenic heat exchanger E100 is connected to the inlet of the switch control valve VM01A, another is connected to the inlet of the switch control valve VM01B, and the third is connected to the inlet of the pressure regulating control valve VM09. One outlet line FH14 of the switch control valve VM01A is connected to the inlet of the low-temperature adsorber A100A, and the other is connected to the switch control valve VM02A. One outlet line FH15 of the low-temperature adsorber A100A is connected to the inlet of the switch control valve VM05A, and the other is connected to the switch control valve VM04A. One outlet line of the switch control valve VM05A goes to the downstream purified hydrogen line FH19, and the other is connected to the outlet of the switch control valve VM05B. A third line is connected to the inlet of the regulating control valve VM13. One outlet line FH16 of the switch control valve VM01B is connected to the inlet of the low-temperature adsorber A100B, and the other is connected to the switch control valve VM02B.

2. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The outlet pipeline FH17 of the low-temperature adsorber A100B is connected in two ways: one to the inlet of the on / off control valve VM05B, and the other to the on / off control valve VM04B. The outlet of the on / off control valve VM05B is connected in three ways: one to the downstream purified hydrogen pipeline FH19, another to the outlet of the on / off control valve VM05A, and a third to the inlet of the regulating control valve VM13. The medium-temperature hydrogen in the regeneration heating pipeline FH20 is connected to the inlet of the regulating control valve VM06. The outlet of the regulating control valve VM06 is connected in two ways: one to the on / off control valve VM04A and... The VM04B line is connected to the inlet of the regulating control valve VM03, the third line is connected to the outlet of the regulating control valve VM10, the fourth line is connected to the outlet of the regulating control valve VM13, the outlet of the regulating control valve VM03 is connected to the outlet of the regulating control valve VM08, and the other line is connected to the inlet of the gas reheater E200. The ambient temperature hydrogen in the regenerated cold blowing pipeline FH21 is connected to the inlet of the regulating control valve VM10. The outlet of the regulating control valve VM09 in the precooling pipeline FH22 is connected to the on / off control valves VM02A and VM02B.

3. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The raw material hydrogen compression purification unit X100 incorporates one or more combinations of pressure swing adsorption, temperature swing adsorption, and membrane separation processes.

4. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The low-temperature heat exchanger E100 includes a wound tube heat exchanger, a printed circuit board heat exchanger, and a plate-fin heat exchanger, and the gas reheater E200 includes a shell-and-tube heat exchanger, a water bath heat exchanger, and an ambient temperature heat exchanger.

5. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The low-temperature adsorbers A100A and A100B are internally insulated structures, filled with one or more combinations of molecular sieves, activated carbon, and silica gel.

6. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The low-temperature adsorber A100A, low-temperature adsorber A100B, low-temperature heat exchanger E100, on / off control valve VM01A, on / off control valve VM01B, on / off control valve VM02A, on / off control valve VM02B, on / off control valve VM04A, on / off control valve VM04B, on / off control valve VM05A, on / off control valve VM05B, regulating control valve VM09, and regulating control valve VM13 are all integrated into the 80K cold box X200.

7. The low-temperature adsorption device for hydrogen liquefaction as described in claim 1, characterized in that, The outlet of the raw material hydrogen compression and purification unit X100 is also equipped with an oxygen content analyzer AI01, an interlocked emergency shut-off valve VM07, and a venting regulating control valve VM12; the outlets of the low-temperature adsorbers A100A and A100B are equipped with an oxygen content analyzer AI02, an interlocked emergency shut-off switch control valve VM05A and a switch control valve VM05B, an interlocked emergency opening switch control valve VM04A and a switch control valve VM04B, and a regulating control valve VM03.

8. The low-temperature adsorption device for hydrogen liquefaction as described in claim 2, characterized in that, It also includes the gas heater E300, which replaces the regulating control valve VM06.

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