PRESSURE RELIEF VALVES
Pressure Relief Valves (Fig 542L)
Applications: NABIC liquid relief valves are intended for use where pressure tightness is required on the discharge side of the valve. They are ideal for use on pump relief and bypass relief applications, also on outside installations and where tamper-proof units are required. Available options: stainless steel springs, high pressure versions and Viton seat design. Construction: the valves are of gunmetal construction with top-guided copper alloy parts. Fitted with chrome vanadium spring as standard, they also incorporate the proven NABIC PTFE to metal seating design. O-Ring seals ensure pressure tightness at cover and cap joints.
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: • High degree of seat tightness • Designed and tested to BS 6759
Working Temperature: -20°C to +195°C
• Certified discharge table
Maximum Working Pressure: 12.5 bar
7
BSPP Inlet x BSPP Outlet 0115 Thread
Set Pressure Bar
0115
Thread
Set Pressure Bar
0115
Thread
Set Pressure Bar
542L-15-1 542L-15-1.5 542L-15-2 542L-15-2.5 542L-15-3 542L-15-3.5 542L-15-4 542L-15-4.5 542L-15-5 542L-15-6 542L-15-7 542L-15-8.5 542L-15-10 542L-15-10.5 542L-20-1 542L-20-1.5 542L-20-2 542L-20-2.5 542L-20-3 542L-20-3.5 542L-20-5 542L-20-6
542L-32-10.5 542L-40-1.5 542L-40-2.5 542L-40-5 542L-40-6 542L-40-7 542L-40-10 542L-50-1.5 542L-50-2 542L-50-4 542L-50-7.5 542L-50-8.5 542L-50-9.5 542L-50-10 542L-50-10.5 542L-65-2 542L-65-3 542L-65-3.5 542L-65-5 542L-80-4.5 542L-80-7
542L-20-6.5 542L-20-7 542L-20-8 542L-20-9 542L-20-10 542L-25-1 542L-25-1.5 542L-25-2 542L-25-2.5 542L-25-3 542L-25-3.5 542L-25-4 542L-25-5 542L-25-6 542L-25-7 542L-25-8 542L-25-10 542L-25-10.5 542L-32-3 542L-32-4 542L-32-8 542L-32-10
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”
1
1.1/4” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2” 1.1/2”
10.5
3/4” 3/4” 3/4” 3/4” 3/4”
6.5
1.5
1.5 2.5
7 8 9
2
2.5
5 6 7
3
10
3.5
1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1” 1”
1
4
10
1.5
4.5
2” 2” 2” 2” 2” 2” 2” 2”
1.5
2
5 6 7
2 4
2.5
3
7.5 8.5 9.5
3.5
8.5
4 5 6 7 8
10
10.5
10
1
10.5
1.5
2.1/2” 2.1/2” 2.1/2” 2.1/2”
2 3
2
10
2.5
3.5
10.5
3
5
1.1/4” 1.1/4” 1.1/4” 1.1/4”
3 4 8
3.5
3” 3”
4.5
5 6
7
Tech Sheet 1400
10
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
991
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