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Vacuum negative pressure safety valve
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Vacuum negative pressure safety valve

Product Overview

Series

A72W-10P/10R


Purpose of use

A72W is suitable for negative pressure system with temperature ≤200℃, when the negative pressure in the container exceeds the permissible value, the valve opens automatically to inhale air; when the negative pressure in the container reaches the permissible value, the valve closes automatically to protect the equipment and system. The valve is installed in normal non-negative pressure system, when the discharge valve of container and system is not opened and negative pressure is generated, this valve opens automatically.

Specifications

Main parts and materials
No. Part Name Material Material
1 Valve body ZG1Cr18Ni9Ti ZGlCr18Ni12Mo2Ti
2 Valve seat 1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti
3 Adjusting ring 1Cr18Ni9Ti 1Crl8Ni12Mo2Ti
4 Valve cover ZG1Crl8Ni9Ti 1Cr18Ni9Ti
5 Stem Valve stem 1Cr18Ni9Ti 1Cr18Nil2Mo2Ti
6 Elastomer 50CrVA 50CrVA coated fluoroplastic
Working temperature ≤200℃
Applicable medium A72W-10P is suitable for nitric acid medium.
A72W-10R is suitable for acetic acid medium.
Main external size
DN D0 D0 D1 D2 L L1 L1
15 95 65 45 4-14 14 2 110
20 105 75 55 4-14 16 2 130
25 115 85 65 4-14 16 2 150
32 140 100 78 4-18 18 2 180
40 150 110 85 4-18 18 3 200
50 165 125 100 4-18 20 3 221
80 200 160 135 4-18 22 3 245
100 220 180 155 8-18 22 3 253
125 250 210 185 8-18 24 3 280
150 285 240 210 8-23 24 3 329
200 340 295 265 8-23 26 3 377
250 395 350 320 12-23 28 3 440

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