BRV7 Direct Acting Bellows Pressure Reducing Valve

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Product Details

Standard or Nonstandard	Standard	Structure	Pressure Reducing
Pressure	Medium Pressure	Power	Pneumatic
Material	Forged	Temperature of Media	Medium Temperature
Media	Water	Place of Origin	Zhejiang, China
Brand Name	WD

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Specifications

BRV7 Direct Acting Bellows Pressure Reducing Valve

BRV7 Direct Acting Bellows Pressure Reducing Valve BRV71 BRV73

Structural Characteristic and Purpose
This pressure reducing valve is robust direct acting bellows pressure reducing valve designed for use on steam, air and inert industrial type gases. The valve is available in four nominal sizes:DN25,DN32 ,DN40 and DN50. Set the outlet pressure through adjusting spring, the opening of valve flap enlarged when the outlet pressure reduced, the opening of valve flap decreased when the outlet pressure reached to the set pressure. The valve pressure of the medium acts on the area of corrugated tube and transduce to adjusting spring, realizing the function of pressure reducing and regulating.

This reducing valve is designed in meet of the need of energy saving. It has the characteristics of multi-function and light. You can adjust the pressure by rotating the plastic hand wheel, no need to use tool, the connection and installation is very convenient. The internal structure use corrugated tube, the sealing face has filtering mesh protecting device, which protect the internal parts from damage, and greatly prolong the service life.

Working Principle:

In operation the valve will modulate as a result of a downstream pressure signal fed through the sensing orifice in the valve stem . This pressure acts on the control bellows generating a force which is balanced by the compressed control spring. The internal forces generated as a result of both upstream and downstream pressures acting on the area of the valve head are minimised by use of a balancing bellows . A graphite reinforced PTFE bush incorporated in both the pushrod/balancing bellows assembly and bottom cap assembly provides two point guiding.

Note: The maximum upstream pressure is 10 bar and it is recommended that the pressure turndown is limited to about 10:1.

BRV71 Screwed NPT connections
BRV73 Flanged PN16,ANSI 150 or JIS 10 connections.

Main Technical Parameters And Indexes Of Performance

Nominal pressure	PN1.6Mpa
Tested pressure of shell	2.4Mpa
Sealing test pressure	1.76Mpa
Maximum upstream pressure	1.0Mpa
Maximum downstream pressure	0.9Mpa
Pressure range of outlet	0.014-0.9Mpa
Medium	Water, steam, liquid, air, oxygen, nitrogen, etc.
Operating temperature	≤ 210 °C

Material Of Main Component

Name of component	Material of component
Valve body,bottom cover,valve cover	cast steel / CF8
valve flap Valve rod ,Valve seat	CF8
bellows	1Cr18Ni9Ti
Membrane Handwheel	Heat-resistant plastic
Spring of main valve	50CrVA
Adjusting spring	60Si2Mn

Contact Us

Yongjia Welldone Machine Co., Ltd.: Contact nameWelldone Machine
Chat Now; Phone86-577-21828499; AddressNo.1058,Shuangta Road,Oubei Town ,Yongjia, Wenzhou, Zhejiang

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BRV7 Direct Acting Bellows Pressure Reducing Valve

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