LGS Safety Relief Valves
Multi-purpose valves suitable for Liquid, Gas and Steam applications.
All our Valves are available from DN15 to DN65 (1/2" to 2 1/2" BSP Female Connections)
Pressure range is 0.2 to 24 bar g. (depending on seal and duty)
The LGS range is now UKCA approved and marked.
Both the PTFE and EPDM sealed LGS Valves have WRAS approval.
Also LGS Valves have KUKreg4 approval. Regulation 4(1)a of the Water Supply (Water Fittings) Regulations 1999 England & Wales: 2009 Northern Ireland and 2014 Byelaws Scotland).
Part Number | Inlet Connection | Range (Bar) | DN | Material | Fitting | Seal |
| L3615A3277 | 1/2" BSP Female | 0.2 to 24 | 15 | Bronze | Open Leaver | PTFE |
| L3620A3307 | 3/4" BSP Female | 0.2 to 24 | 20 | Bronze | Open Leaver | PTFE |
| L3625A3337 | 1" BSP Female | 0.2 to 24 | 25 | Bronze | Open Leaver | PTFE |
| L3632A3367 | 1 1/4" BSP Female | 0.2 to 24 | 32 | Bronze | Open Leaver | PTFE |
| L3640A3397 | 1 1/2" BSP Female | 0.2 to 24 | 40 | Bronze | Open Leaver | PTFE |
| L3650A3427 | 2" BSP Female | 0.2 to 24 | 50 | Bronze | Open Leaver | PTFE |
| L3665A3517 | 2 1/2" BSP Female | 0.2 to 24 | 65 | Bronze | Open Leaver | PTFE |
| L3615A1277 | 1/2" BSP Female | 0.2 to 24 | 15 | Bronze | Sealed Cap | PTFE |
| L3620A1307 | 3/4" BSP Female | 0.2 to 24 | 20 | Bronze | Sealed Cap | PTFE |
| L3625A1337 | 1" BSP Female | 0.2 to 24 | 25 | Bronze | Sealed Cap | PTFE |
| L3632A1367 | 1 1/4" BSP Female | 0.2 to 24 | 32 | Bronze | Sealed Cap | PTFE |
| L3640A1397 | 1 1/2" BSP Female | 0.2 to 24 | 40 | Bronze | Sealed Cap | PTFE |
| L3650A1427 | 2" BSP Female | 0.2 to 24 | 50 | Bronze | Sealed Cap | PTFE |
| L3665A1517 | 2 1/2" BSP Female | 0.2 to 24 | 65 | Bronze | Sealed Cap | PTFE |
| L3615A3276 | 1/2" BSP Female | 0.2 to 24 | 15 | Bronze | Open Leaver | EPDM |
| L3620A3306 | 3/4" BSP Female | 0.2 to 24 | 20 | Bronze | Open Leaver | EPDM |
| L3625A3336 | 1" BSP Female | 0.2 to 24 | 25 | Bronze | Open Leaver | EPDM |
| L3632A3366 | 1 1/4 " BSP Female | 0.2 to 24 | 32 | Bronze | Open Leaver | EPDM |
| L3640A3396 | 1 1/2" BSP Female | 0.2 to 24 | 40 | Bronze | Open Leaver | EPDM |
| L3650A3426 | 2" BSP Female | 0.2 to 24 | 50 | Bronze | Open Leaver | EPDM |
| L3665A3516 | 2 1/2" BSP Female | 0.2 to 24 | 65 | Bronze | Open Leaver | EPDM |
| L3615A1276 | 1/2" BSP Female | 0.2 to 24 | 15 | Bronze | Sealed Cap | EPDM |
| L3620A1306 | 3/4" BSP Female | 0.2 to 24 | 20 | Bronze | Sealed Cap | EPDM |
| L3625A1336 | 1" BSP Female | 0.2 to 24 | 25 | Bronze | Sealed Cap | EPDM |
| L3632A1366 | 1 1/4" BSP Female | 0.2 to 24 | 32 | Bronze | Sealed Cap | EPDM |
| L3640A1396 | 1 1/2" BSP Female | 0.2 to 24 | 40 | Bronze | Sealed Cap | EPDM |
| L3650A1426 | 2" BSP Female | 0.2 to 24 | 50 | Bronze | Sealed Cap | EPDM |
| L3665A1516 | 2 1/2" BSP Female | 0.2 to 24 | 65 | Bronze | Sealed Cap | EPDM |
DN15 LGS Relief Valve L3615A3277
SKU: L3615A3277
15mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN20 LGS Relief Valve L3620A3307
SKU: L3620A3307
20mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN25 LGS Relief Valve L3625A3337
SKU: L3625A3337
25mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN32 LGS Relief Valve L3632A3367
SKU: L3632A3367
32mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN40 LGS Relief Valve L3640A3397
SKU: L3640A3397
40mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN50 LGS Relief Valve L3650A3427
SKU: L3650A3427
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN65 LGS Relief Valve L3665A3517
SKU: L3665A3517
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN15 LGS Relief Valve L3615A1277
SKU: L3615A1277
15mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN20 LGS Relief Valve L3620A1307
SKU: L3620A1307
20mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN25 LGS Relief Valve L3625A1337
SKU: L3625A1337
25mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN32 LGS Relief Valve L3632A1367
SKU: L3632A1367
32mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN40 LGS Relief Valve L3640A1397
SKU: L3640A1397
40mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN50 LGS Relief Valve L3650A1427
SKU: L3650A1427
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN65 LGS Relief Valve L3665A1517
SKU: L3665A1517
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN15 LGS Relief Valve L3615A3276
SKU: L3615A3276
15mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam is 2.5 bar g. (36.25 psi g.)Overpressure = Set pressure +10...
DN20 LGS Relief Valve L3620A3306
SKU: L3620A3306
20mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN25 LGS Relief Valve L3625A3336
SKU: L3625A3336
25mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN32 LGS Relief Valve L3632A3366
SKU: L3632A3366
32mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN40 LGS Relief Valve L3640A3396
SKU: L3640A3396
40mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN50 LGS Relief Valve L3650A3426
SKU: L3650A3426
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN65 LGS Relief Valve L3665A3516
SKU: L3665A3516
50mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 2.50 bar g. (36.25 psi g.)Overpressure = Set pressure +1...
DN15 LGS Relief Valve L3615A1276
SKU: L3615A1276
15mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam is 14 bar g. (203 psi g.)Overpressure = Set pressure +10% (...
DN20 LGS Relief Valve L3620A1306
SKU: L3620A1306
20mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14.00bar g. (203 psi g.)Overpressure = Set pressure +10%...
DN25 LGS Relief Valve L3625A1336
SKU: L3625A1336
25mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas & SteamNotes:Maximum Pressure when used on saturated steam us 14.00 bar g. (203 psi g.)Overpressure = Set pressure +10...