DN40 LGS HI-FLOW Relief Valve H3640A1E97

40mm Nominal Bore Single Trim Enclosed Discharge Relief Valve for Liquid, Gas and Steam

Notes:

Maximum Pressure when used on Saturated Steam is 14 bar g. (203 psi g.)

Overpressure = Set pressure +10% (or 0.1 bar g., whichever is greater)

Blowdown pressure (Gas & Steam) = Set pressure -15% (or 0.3 bar g., whichever is greater)

Blowdown pressure (Liquid) = Set pressure -20% (or 0.6 bar g., whichever is greater)

Liquid (Water)

Pressure (bar g.)	0.2	1.0	5.0	10.0	15.0	20.0	24.0
Flow Rate (kg/Hour)	7,802.26	17,446.38	39,011.30	55,170.31	67,569.56	78,022.60	85,469.48

Liquid (Hot Water)

Pressure (bar g.)	0.2	1.0	5.0	10.0	15.0	20.0	24.0
Flow Rate (kg/Hour)	11,403.30	25,498.56	57,016.52	80,633.53	98,755.50	114,033.03	124,916.93

Gas (Air)

Pressure (bar g.)	0.2	1.0	5.0	10.0	15.0	20.0	24.0
Flow Rate (kg/Hour)	461.20	864.98	2,665.96	4,917.18	7,168.41	9,419.63	11,220.61

Steam (Saturated Steam)

Pressure (bar g.)	0.2	1.0	5.0	10.0	14.0
Flow Rate (kg/Hour)	272.95	548.29	1,635.15	2,969.17	4,030.02

Min Pressure	0.2 bar g. (2.9 psi g.)
Max Pressure	24 bar g. (348 psi g.) 14.00 bar g. (203.00 psi g.) on steam
Temperature Range	-60°C to 200°C
Flow Area	1256.00 mm² (40mm inlet bore diameter)
Inlet Connection	1 1/2" BSP female
Outlet Connection	2" BSP female
Flow Rate	Refer to Flow Tables
Materials	Bronze
Seal Material	PTFE
Test Certifications	Supplied free of charge
Approval	UKCA – PE(S)R, BS EN ISO 4126-1, PED Pressure Equipment Directive (CE Marked), EAC customs union (Russia, Belarus and Kazakhstan)