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Technical Information Fig No. A72

Valve Pic
Flow Chart

 

 

The all stainless steel construction of the Fig. A72 valve makes it suitable for a wide range of applications.The valve is single seated, piston controlled and spring regulated.

The hydraulically balanced spindle enables the valve to maintain a constant upstream (relieving) pressure regardless of downstream pressure fluctuations.

It is an ideal valve to employ where a direct spring loaded type of valve is too insensitive to pressure flow variations.

Protects systems from overpressure.  Maintains constant pressure in a system by discharging excess product to atmosphere or container.  Reduces cavitation or other damage to pumps by bypassing back to suction at a given pressure.  For water, oil, gas or chemical services.

Dimensions (mm)

Valve Size 8 10 15 20 25 32 40 50
'A' (screwed) 51 93 93 93 113 137 173 176
'A' (flanged) - - 135 156 214 214 214 214
'B' 13 41 48 48 82 84 112 112
'C' 139 126 147 138 181 181 220 220
Mass / kg 1 2 2 3.5 6 6 12 12

Specifications

Connections B.S.P./N.P.T. Female
Working Pressure 1600 kPa Maximum
Adjustable Ranges 0-230, 200-700, 500-1600 kPa
Temperature Ranges -10oC - 100oC

Materials

Name Description Material
15 Adjusting Screw & Locknut SS316
14 Upper Spring Pad SS316
13 Regulating Spring SS304
12 Lower Spring Pad SS316
11 Piston SS316
10 Piston U Seal Nitrile
9 Spindle O Ring Nitrile
8 Valve Spindle SS316
7 Disc O Ring Seal Nitrile
6 Retaining Disc SS316
5 Cap O Ring Gasket Nitrile
4 n/a n/a
3 Spring Cage SS316
2 Cap SS316
1 Body SS316
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