SAFETY VALVES
Safety Relief Valves (Fig 542)
Applications: the Fig 542 safety valve is an extremely versatile valve, suitable for use on hot water, steam or air. Although designed primarily for the protection of hot water boilers, its wide range of applications make it ideal as a general purpose safety valve. Construction: the Fig 542 is of gunmetal construction with diaphragm protected working parts and PTFE to metal seating. All wetted parts manufactured from dezincification resistant materials, approved by the ater Research Centre for use on potable water. Inlet and outlet connections are of equal size, with female threads to BS 21. Sizes from DN32 upwards are also available with flanged inle connections.
Please Note: due to pressure setting and certification of this product, normal delivery wil be up to 3 working days (manufacturers stock permitting), although a quicker service may be available if required. Please contact our sales team.
Features: • Resilient PTFE seating designs • High degree of seat tightness • Suitable for hot water, steam or air • Diaphragm protected working parts • Safe manual testing
Working Temperature: -20°C to +195°C
• Easy inspection and cleaning • Pressure setting locked and sealed • Designed and tested to BS 6759 • Capacities certified by TOC
Maximum Working Pressure: 10.5 bar
BSPP Inlet x BSPP Outlet 0115 Thread
7
Set Pressure Bar
0115
Thread
Set Pressure Bar
0115
Thread
Set Pressure Bar
542-15-1
542-20-7.5
542-32-6.5
1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 1/2” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”
1
3/4” 3/4” 3/4” 3/4” 3/4” 3/4”
7.5
1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2”
6.5
542-15-1.5
542-20-8
542-32-7 542-32-8
1.5
8
7 8
542-15-2
542-20-8.5 542-20-9 542-20-10 542-20-10.5
2
8.5
542-15-2.5
542-32-8.5
2.5
9
8.5
542-15-3
542-32-9
3
10
9
542-15-3.5
542-32-9.5 542-32-10
3.5
10.5
9.5
542-15-4
542-25-1
4
1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1”
1
10
542-15-4.5
542-25-1.5
542-40-1
4.5
1.5
1
542-15-5
542-25-2
542-40-1.5
5
2
1.5
542-15-5.5
542-25-2.5
542-40-2
5.5
2.5
2
542-15-6 542-15-7
542-25-3
542-40-3.5
6 7
3
3.5
542-25-3.5
542-40-4 542-40-5 542-40-6 542-40-7
3.5
4 5 6 7
542-15-7.5
542-25-4
7.5
4
542-15-8
542-25-4.5
8
4.5
542-15-8.5
542-25-5 542-25-6 542-25-7
8.5
5 6 7
542-15-9
542-40-7.5 542-40-8 542-40-10 542-40-10.5
9
7.5
542-15-9.5 542-15-10 542-15-10.5
9.5
8
542-25-7.5
10
7.5
10
542-25-8
10.5
8
10.5
542-20-1
542-25-8.5
542-50-2
1
8.5
2” 2” 2” 2” 2” 2” 2” 2”
2
542-20-1.5
542-25-9
542-50-3.5
1.5
9
3.5
542-20-2
542-25-9.5 542-25-10 542-25-10.5
542-50-6 542-50-7
2
9.5
6 7
542-20-2.5
2.5
10
542-20-3
542-50-7.5 542-50-8 542-50-10 542-50-10.5
3
10.5
7.5
542-20-3.5
542-32-1
3.5
1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4” 1.1/4”
1
8
542-20-4
542-32-2.5
4
2.5
10
542-20-4.5
542-32-3
4.5
3
10.5
542-20-5
542-32-3.5
542-65-3 542-65-4
5
3.5
2.1/2” 2.1/2” 2.1/2”
3 4
542-20-5.5
542-32-4
5.5
4
542-20-6 542-20-7
542-32-4.5
542-65-7.5
6 7
4.5
7.5
542-32-5
5
Tech Sheet 1399
We have listed all the popular sizes and pressure ratings, however other variations are available.
Individual test certificates to be requested at the time of orde
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