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Check valve special for ammonia gas

A check valve, ammonia technology, applied in the direction of control valves, valve devices, functional valve types, etc., can solve the problems of long-term use that cannot meet the working conditions, poor sealing performance, short service life, etc., to achieve superior effect, check Good effect and tight sealing effect

Inactive Publication Date: 2016-10-26
JIANGSU JINSHENGYUAN SPECIAL VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of this type of valve has always maintained the traditional flat and spherical sealing form, the sealing performance is poor, the service life is short, and it cannot meet the long-term use effect of the working condition, which has a greater impact on the customer's production

Method used

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  • Check valve special for ammonia gas

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Effect test

Embodiment Construction

[0013] like figure 1 As shown, the special check valve for ammonia includes a valve body 1, a valve cover 5, a valve seat 8, and a valve disc 7. The valve seat 8 is fixed in the valve body 1, and the valve body 1 includes an inlet 9, an outlet 10, and a middle connection Port 11, the inlet and outlet 9, 10 are respectively provided with interface flange 12, and the middle connection port 11 is provided with a connecting flange 13, the inlet and outlet 9, 10 are located on the same axis, and the middle connection port 11 is located in the direction of the inlet and outlet Vertical direction; the bonnet 5 is sealed and fixed by a plurality of bolts and nuts and the connecting flange 12, and a sealing gasket 4 is arranged between the bonnet 5 and the connecting flange 12; The center of one end face of the disc 7 is fixedly connected to the disc rod 6, the disc rod 6 fits in the guide sleeve 13, the other end face of the valve disc 7 is in close contact with the valve seat 8, and ...

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Abstract

A check valve special for ammonia gas is related to a special valve and comprises a valve body, a bonnet, a valve seat and a valve clack, the valve seat is fixed in the valve body, the valve body comprises a middle connecting port, an inlet and outlet of the valve body are provided respectively with joint flanges, the middle connecting port is provided with a connecting flange, the inlet and outlet are positioned on a same axis, and the middle connecting port is positioned perpendicular to the inlet and outlet; the bonnet is hermetically fixed to the connecting flange through a plurality of bolts and nuts; the center of the inner end surface of the bonnet is integrally provided with a guide sleeve, a valve clack rod is fitted in the guide sleeve, and a travel distance of the valve clack is less than a distance from a free end surface of the guide sleeve to the valve clack; an end surface of the valve seat in contact with the valve clack is provided with a circular deformed groove, polytetrafluoroethylene resin seal is disposed in the deformed groove, an end surface of the valve clack in contact with the valve seat is provided with a circular conical surface, and the conical surface mates with the polytetraflouroethylene resin to form a sealing pair. The valve has good sealing effect, good corrosion resistance and long service life.

Description

technical field [0001] The invention relates to a special valve, in particular to the technical field of manufacturing a special check valve for ammonia. Background technique [0002] At present, domestic check valves are roughly divided into three categories according to their forms: lifting type, vertical type, and swing type. They are selected and used according to the installation requirements of the pipeline under working conditions. The type is suitable for vertical installation, and the reasonable selection of the structure has a great influence on the use effect of the valve. This type of valve has always maintained the traditional flat and spherical sealing form in structure, with poor sealing performance and short service life, which cannot meet the effect of long-term use under working conditions and has a greater impact on customer production. [0003] With the further structural adjustment of the country's heavily polluting industries, various power plants have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/02
CPCF16K15/02
Inventor 毛春龙毛金根陈善俊
Owner JIANGSU JINSHENGYUAN SPECIAL VALVE
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