Relief Valves and Vacuum Breakers

Relief valves and vacuum breakers are vital safety devices that protect systems and equipment from overpressure or vacuum conditions. Relief valves are designed to automatically relieve excessive pressure within a system, preventing potential damage or catastrophic failure. They are commonly used in boilers, pressure vessels, pipelines, and hydraulic systems. On the other hand, vacuum breakers are utilized to prevent the formation of a vacuum or negative pressure within a system, which can lead to implosion or damage. Vacuum breakers are commonly found in plumbing systems, water supply lines, and industrial processes. These valves ensure system integrity and safety by releasing pressure or preventing vacuum, safeguarding equipment, and preventing potential hazards.

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, EPR Seat, 125 psig, 1-1/2" x 2" (MNPT x FNPT)
MPN:19EHGA125
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$832.81$986.04

Regular Price: $986.04, you save $153.23 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, EPR Seat, 125 psig, 2" x 2-1/2" (MNPT x FNPT)
MPN:19EJHA125
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$1,294.40$1,532.56

Regular Price: $1,532.56, you save $238.16 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1" (MNPT x FNPT)
MPN:19MEEA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$478.55$566.60

Regular Price: $566.60, you save $88.05 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1" x 1-1/4" (MNPT x FNPT)
MPN:19MFEA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$530.26$627.81

Regular Price: $627.81, you save $97.55 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/2" (MNPT x FNPT)
MPN:19MGGA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$691.42$818.64

Regular Price: $818.64, you save $127.22 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/2" x 2" (MNPT x FNPT)
MPN:19MHGA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$757.12$896.41

Regular Price: $896.41, you save $139.29 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/4" x 1-1/2" (MNPT x FNPT)
MPN:19MGFA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$609.33$721.44

Regular Price: $721.44, you save $112.11 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1/2" x 3/4" (MNPT x FNPT)
MPN:19MDCA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$399.19$472.64

Regular Price: $472.64, you save $73.45 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 2" (MNPT x FNPT)
MPN:19MHHA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$1,077.27$1,275.48

Regular Price: $1,275.48, you save $198.21 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, EPR Seat, 125 psig, 1-1/2" x 2" (MNPT x FNPT)
MPN:19EHGA125
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$832.81$986.04

Regular Price: $986.04, you save $153.23 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, EPR Seat, 125 psig, 2" x 2-1/2" (MNPT x FNPT)
MPN:19EJHA125
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$1,294.40$1,532.56

Regular Price: $1,532.56, you save $238.16 (16%)
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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1" (MNPT x FNPT)
MPN:19MEEA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$478.55$566.60

Regular Price: $566.60, you save $88.05 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1" x 1-1/4" (MNPT x FNPT)
MPN:19MFEA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$530.26$627.81

Regular Price: $627.81, you save $97.55 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/2" (MNPT x FNPT)
MPN:19MGGA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$691.42$818.64

Regular Price: $818.64, you save $127.22 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/2" x 2" (MNPT x FNPT)
MPN:19MHGA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$757.12$896.41

Regular Price: $896.41, you save $139.29 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1-1/4" x 1-1/2" (MNPT x FNPT)
MPN:19MGFA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$609.33$721.44

Regular Price: $721.44, you save $112.11 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 1/2" x 3/4" (MNPT x FNPT)
MPN:19MDCA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$399.19$472.64

Regular Price: $472.64, you save $73.45 (16%)
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Available for Purchase

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Apollo ASME Sec I Steam Bronze Safety Relief Valve with Brass Trim, Metal Seat, 100 psig, 2" (MNPT x FNPT)
MPN:19MHHA100
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
ASME Sections I & VIII capacity certified safety valve for overpressure protection of steam power boilers, pressure piping systems, pressure vessels, piping and similar equipment. Suitable for steam, air and non-hazardous gases.ASME Section I & VIII Certified Capacities5 - 300 psig Set Pressures @ -60°F min. / 406°F max.1/2" - 2-1/2" Inlet Connections AvailableStainless Steel Wetted Trim (19L, 19S)PFA and Metal Seat Styles AvailableMade in the USA
Sale Price:

$1,077.27$1,275.48

Regular Price: $1,275.48, you save $198.21 (16%)
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Available for Purchase

Subject to factory lead times