Steam & Boilerhouse Safety Pressure Relief Valves
Johnson Valves offer a range of safety pressure relief valves for high temperature, steam and boilerhouse applications to various standards.
Free pressure setting, testing and certification.
All safety relief valves supplied by Johnson Valves are set to your pressure requirements and issued with a certificate to the relevant standards at no extra cost.
716 – Bailey Birkett High Capacity Full Lift Safety Relief Valve
The 716 range of safety relief valves offer protection against over pressure on boilers, compressors, pressure vessels, process pipelines and pressurised equipment. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
High Capacity • Full Lift • Side Discharge • Lever or Dome Top
Size & Connections
15mm (1/2″) to 50mm (2″) • BSP/NPT • Flanged PN16/25, ANSI 150, BS10 E/F/H*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water (dependent on trim)
Materials
Bronze Body • Aflas, EPDM or Stainless Steel Disc
Set Pressure Range
0.35 to 32 bar (dependent on size & duty)
Temperature
Aflas Disc: -29°C to 200°C • EPDM Disc: -29°C to 150°C • SS Disc: -29°C to 220°C
Compliance & Approvals
BS6759 Part 1, 2 & 3 (dependent on duty) • BSEN ISO 4126 Part 1
* Flanged inlet x Screwed outlet only, specify when enquiring
500 – Nabic High Capacity, High Lift Safety Relief Valve
The Nabic 500 safety valve is an extremely versatile valve, suitable for use on hot water, steam or air. Although designed primarily or use on un-vented hot water heating systems, where a high capacity, emergency steam relief capability is required, it is also an ideal general purpose safety valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
High Capacity • Full Lift • Side Discharge • Lifting Lever
Size & Connections
15mm (1/2″) to 65mm (2 1/2″) BSP Female
Duty
Air • Oil • Inert Gasses • Steam • Water
Materials
Bronze Body • PTFE Seat Seal (Viton option)
Set Pressure Range
0.69 to 12.5 bar (dependent on size)
Temperature
-20°C to 195°C
Compliance & Approvals
BS6759 • BSEN ISO 4126 • WRAS (1 bar and above)
707 – Bailey Birkett High Lift Safety Relief Valve
The 707 range of safety relief valves offer protection against over pressure on boilers, compressors, pressure vessels, process pipelines and pressurised equipment. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Standard Capacity • High Lift • Side Discharge • Lever or Dome Top
Size & Connections
15mm (1/2″) to 50mm (2″) • BSP/NPT FxF or MxF • Flanged PN25, ANSI 150, BS10 H*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water (dependent on trim)
Materials
Bronze Body • Aflas, EPDM or Stainless Steel Disc
Set Pressure Range
0.35 to 24 bar
Temperature
Aflas Disc: -20°C to 200°C • EPDM Disc: -20°C to 95°C • SS Disc: -20°C to 224°C
Compliance & Approvals
BS6759 Part 1, 2 & 3 (dependent on duty) • BSEN ISO 4126 Part 1 • WRAS (EPDM disc)
* Flanged inlet x Screwed outlet only, specify when enquiring
542 – Nabic Safety Relief Valve
The Nabic 542 safety valve is an extremely versatile valve, suitable for use on hot water, steam or air. Although designed primarily for protection of hot water boilers, it’s wide range of applications make it an ideal general purpose safety valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Standard Capacity • Side Discharge • Lifting Lever
Size & Connections
15mm (1/2″) to 80mm (3″) BSP Female
Duty
Air • Oil • Inert Gasses • Steam • Water
Materials
Bronze Body • PTFE Seat Seal (Viton option)
Set Pressure Range
0.55 to 10.5 bar (dependent on size)
Temperature
-20°C to 195°C
Compliance & Approvals
BS6759 • BSEN ISO 4126 • WRAS (1 bar and above)
542F – Nabic Safety Relief Valve – Flanged x BSP
The Nabic 542 safety valve is an extremely versatile valve, suitable for use on hot water, steam or air. Although designed primarily for protection of hot water boilers, it’s wide range of applications make it an ideal general purpose safety valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Standard Capacity • Side Discharge • Lifting Lever
Size & Connections
DN32 (1 1/4″) to DN80 0mm (3″) Flanged x BSP
Duty
Air • Oil • Inert Gasses • Steam • Water
Materials
Bronze Body • PTFE Seat Seal (Viton option)
Set Pressure Range
0.55 to 10.5 bar (dependent on size)
Temperature
-20°C to 195°C
Compliance & Approvals
BS6759 • BSEN ISO 4126 • WRAS (1 bar and above)
683 / 686 / 693 / 696 – Bailey Birkett Single High Lift Cast Steel Safety Relief Valve
The 680 and 690 series of single high lift safety valves combine a top guided design, to provide an unobstructed seat bore, with a floating disc that aligns correctly under all working conditions. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Single Pot • High Lift • Side Discharge • Lever (686/696) or Dome Top (683/693)
Size & Connections
DN40 to DN100 • Flanged PN16/25/40, ANSI 150/300, BS10 E/F/H*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water
Materials
Cast Steel Body & Bonnet • Stainless Steel Disc
Set Pressure Range
683/686 : 0.25 to 13 bar • 693/696 : 0.25 to 13 bar
Temperature
-20°C to 230°C
Compliance & Approvals
BS6759 Part 1, 2 & 3 (dependent on duty)
* Dependent on series, specify when enquiring
723 / 726 / 733 / 736 – Bailey Birkett Double High Lift Cast Steel Safety Relief Valve
The 720 and 730 series of double (twin) high lift safety valves combine a top guided design, to provide an unobstructed seat bore, with a floating disc that aligns correctly under all working conditions. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Double (Twin) Pot • High Lift • Side Discharge • Lever (726/736) or Dome Top (723/733)
Size & Connections
DN40 to DN100 • Flanged PN16/25/40, ANSI 150/300, BS10 E/F/H*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water
Materials
Cast Steel Body & Bonnet • Stainless Steel Disc
Set Pressure Range
683/686 : 0.25 to 13 bar • 693/696 : 0.25 to 13 bar
Temperature
-20°C to 230°C
Compliance & Approvals
BS6759 Part 1, 2 & 3 (dependent on duty)
* Dependent on series, specify when enquiring
746 – Bailey Birkett High Capacity Full Lift Carbon or Stainless Steel Safety Relief Valve
The 746 combination of top guiding, unobstructed seat bore and full lift capability ensures the highest possible discharge rate. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
High Capacity • Full Lift • Side Discharge • Lever, Packed Lever or Dome Top
Size & Connections
DN25 to DN100 • Flanged PN1640, ANSI 150/300*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water
Materials
Carbon or Stainless Steel Body • Stainless Steel Disc (EPDM, FKM or PTFE option)
Set Pressure Range
0.35 up to 40 bar (dependent on size)
Temperature
Stainless Steel Disc : -46°C to 427°C (see data sheet for others)
Compliance & Approvals
BS6759 Part 1, 2 & 3 (dependent on duty) • ASME VIII/TUV-AD Merkblatt A2 (on request)
* Dependent on series, specify when enquiring
852 – Goetze Bronze Safety Relief Valve – Flanged
The Goetze 852 safety relief valve has a bronze body with various seal options making it suitable for various duties including seawater. This valve can be supplied either with open or closed cap. There is also an option with a bellows assembly. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Side Discharge • Lever or Dome Top • Optional Bellows
Size & Connections
DN40 to DN50 • Flanged PN40 x 16
Duty
Air • Oil • Inert Gasses • Seawater • Steam • Water
Materials
Bronze Body & Spring Housing • NBR Disc (SS, EPDM, FKM, FFKM & PTFE option)
Set Pressure Range
0.5 to 25 bar
Temperature
NBR Disc : -30°C to 130°C (see datasheet for other materials)
Compliance & Approvals
TÜV Test Approval 2007 • BSEN ISO 4126-1
455 – Goetze Stainless Steel Safety Relief Valve – Flanged
The Goetze 355 safety relief valve has a stainless steel body with various seal options. This valve can be supplied either with open or closed cap. There is also an option with a bellows assembly. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Side Discharge • Lever or Dome Top • Optional Bellows
Size & Connections
DN15 to DN100 • Flanged PN40 x 16
Duty
Air • Oil • Inert Gasses • Steam • Water
Materials
St. St. Body & Spring Housing • St. St. Disc (EPDM, FKM, FFKM & PTFE option)
Set Pressure Range
0.2 to 40 bar
Temperature
Stainless Steel Disc : -60°C to 400°C (see datasheet for other materials)
Compliance & Approvals
TÜV Test Approval 2094 • BSEN ISO 4126-1
355 – Goetze Cast Iron Safety Relief Valve – Flanged
The Goetze 355 safety relief valve has a cast iron body with various seal options. This valve can be supplied either with open or closed cap. There is also an option with a bellows assembly. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
Side Discharge • Lever or Dome Top • Optional Bellows
Size & Connections
DN15 to DN100 • Flanged PN40 x 16
Duty
Air • Oil • Inert Gasses • Steam • Water
Materials
Cast Iron Body & Spring Housing • St. St. Disc (EPDM, FKM, FFKM & PTFE option)
Set Pressure Range
0.2 to 40 bar
Temperature
Stainless Steel Disc : -10°C to 350°C (see datasheet for other materials)
Compliance & Approvals
TÜV Test Approval 2094 • BSEN ISO 4126-1
JV131001 – High Capacity Full Lift Ductile Iron Safety Relief Valve
The JV131001 is a economical safety relief valve for the protection of pressure systems and boiler systems. Suitable for use with steam, gases, vapours and liquids within the chemical and processing industries. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.
Type
High Capacity • Full Lift • Side Discharge • Closed Bonnet • Open Lifting Device
Size & Connections
DN15 to DN250 • Flanged PN40 x 16*
Duty
Air • Inert Gases • Oil • Process Liquids • Steam • Water
Materials
Ductile Iron Body • Stainless Steel Seat & Disc
Set Pressure Range
0.2 to 40 bar (dependent on duty, size & temperature)
Temperature
-10°C to 350°C
Compliance & Approvals
BS6759 • DIN EN ISO 4126-1 • AD2000-A2 • TRD421 • Lloyds • GL • DNV • BV
* DN65 & DN100 – PN16 x PN16 as standard (PN40 x PN16 option)