Regulating valve with double valve seats

A control valve, double seat technology, applied in the field of double seat control valve, can solve the problems of unsuitable pressure difference, unbalanced, difficult processing, etc., to achieve small pressure drop loss, good action stability, flow rate big effect

Inactive Publication Date: 2011-10-19
ZHEJIANG KEHAI INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the single-seat control valve has the advantages of small pressure drop loss and small leakage, it is not suitable for use in the conditions of large pressure difference between the front and rear of the valve or medium containing small impurities due to the top-guided structure and the unbalanced force.
Although the s

Method used

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  • Regulating valve with double valve seats

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Embodiment Construction

[0013] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] Such as figure 1 In the embodiment, a double-seat regulating valve includes a bottom cover 1, a valve core 2, a valve body 3, a valve cover 4, a sealing packing 5, a packing gasket 6, a packing gland 7, an upper guide sleeve 8, and a valve stem 9 , Locating pin 10, upper valve seat 11, lower valve seat 12 and connectors.

[0015] The valve body is a valve body with a large valve cavity structure with upper and lower valve seat partition walls. The two valve seats are respectively fixed on the upper and lower partition walls of the valve inner cavity, and a sealing gasket is fixed between the valve seat and the valve body. piece.

[0016] The valve core adopts a guiding structure that is respectively installed on the upper guide sleeve on the upper part of the valve body and the stuffy cover on the bottom of the valve body, which improve...

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PUM

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Abstract

The invention relates to a regulating valve with double valve seats. The regulating valve comprises a bottom cover, a valve core, a valve body, a sealing packing material, a packing material washer, a packing gland, an upper guide sleeve, a valve rod, a positioning pin, an upper valve seat, a lower valve seat and a connecting piece, wherein the valve body is a large valve cavity structure valve body with an upper valve seat insulating wall and a lower valve seat insulating wall; a double valve core structure of integrated same flow characteristic curve is adopted for the valve core; a double guide structure of two orientations at the upper guide sleeve and a valve body bottom part blank cap is adopted; balance holes are manufactured on the blank cap and the upper guide sleeve; and copper sleeves manufactured by adopting tin bronze is adopted for the embedding of the guide holes on the upper guide sleeve and the blank cap. The invention has the beneficial effects of less loss of pressure drop, large flow, wide adjustable extent, good action stability, and the regulating valve is especially suitable for the use of a pipeline system that the caliber is greater than DN 200, the front and rear pressure difference of the valve is great, the required rated flow is great, the leakage level requirement is low, and mediums have fine impurity working conditions.

Description

technical field [0001] The invention relates to a regulating control valve, in particular to a double valve seat regulating valve. Background technique [0002] Single-seat regulating valve and sleeve regulating valve are the two most widely used regulating valves in various industrial fluid control systems today. Although the single-seat control valve has the advantages of small pressure drop loss and small leakage, it is not suitable for use in the conditions of large pressure difference between the front and rear of the valve or medium containing small impurities due to the top-guided structure and unbalanced force. Although the sleeve regulating valve has the advantages of large allowable pressure difference and good stability, when the valve caliber is large, the structural size of the sleeve valve core is correspondingly large, and it is easy to deform, so it must be manufactured to achieve high matching accuracy. , the processing difficulty is relatively large. Con...

Claims

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Application Information

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IPC IPC(8): F16K17/20F16K27/02
Inventor 姜纪财陆国军
Owner ZHEJIANG KEHAI INSTR
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