Technical Information Fig No. A72
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 | - | 10 | 15 | 20 | 25 | 32 | 40 | 50 |
---|---|---|---|---|---|---|---|---|
'A' (screwed) | - | 93 | 93 | 93 | 114 | 137 | 176 | 176 |
'A' (flanged) | - | - | 135 | 156 | 152 | 214 | 214 | 214 |
'B' | - | 45 | 45 | 45 | 75 | 84 | 112 | 112 |
'C' | - | 135 | 135 | 135 | 181 | 181 | 220 | 220 |
Mass / kg | - | 2 | 2 | 3.5 | 6 | 7 | 10 | 10.5 |
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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