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KUNKLE Relief Valves

ASME-compliant aluminium, bronze and stainless-steel relief valves used to control and limit the pressure in a system by releasing excess pressure. Available in MNPT and FNPT connections and in different sizes

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AQUATROL SAFETY VALVES -

740 Series Brass/Bronze/Stainless Steel Safety Relief Valve

Aquatrol 740 Series safety relief valves are designed to open when the pressure exceeds the stress limits and prevent pumps and pipelines from fire accidents or system failure. These units feature a brass / bronze body for strength, ductility, malleability and corrosion resistance and a full-nozzle design flanged to the pressurised system. They are further integrated with a stainless-steel disc for enhancing seating tightness and preventing flow under ambient operating conditions, and an adjustable nozzle ring for controlling the fluid exit. They meet ASME Section VIII standards and are ideal for air / gas, liquid and steam applications. Choose from a wide range of these safety relief valves available in factory set pressures ranging from 15 to 300 psi on Raptor Supplies.

AQUATROL SAFETY VALVES 740FH-M2L-15A
AQUATROL SAFETY VALVES 740DC-M1A-15B
StyleModelFactory Set PressureInlet SizeOutlet SizeOverall HeightOverall LengthTest LeverPrice (ex. VAT)
A740FH-M2L-1515 psi1.25"1.5"9.25"9.25"No€465.33
A740DF-M2L-1515 psi3/4"1"7.375"7.375"No€318.85
A740DC-M2L-1515 psi1/2"3/4"7.375"7.375"No€297.85
B740DC-M1A-1515 psi1/2"3/4"7.375"7.375"Yes€311.97
B740GF-M1A-1515 psi2"2"10.25"10.25"Yes€857.12
B740DF-M1A-1515 psi3/4"1"7.375"7.375"Yes€324.59
B740FG-M1A-1515 psi1.5"1.5"9.25"9.25"Yes€557.13
B740EF-M1A-1515 psi1"1.25"8.125"8.125"Yes€393.55
B740FH-M1A-1515 psi1.25"1.5"9.25"9.25"Yes€465.08
A740FG-M2L-1515 psi1.5"1.5"9.25"9.25"No€548.89
A740GF-M2L-1515 psi2"2"10.625"10.625"No€845.29
A740EF-M2L-1515 psi1"1.25"8.125"8.125"No€386.47
A740DC-M2L-2525 psi1/2"3/4"7.375"7.375"No€297.85
A740GF-M2L-2525 psi2"2"10.625"10.625"No€845.29
A740EF-M2L-2525 psi1"1.25"8.125"8.125"No€386.47
B740DF-M1A-2525 psi3/4"1"7.375"7.375"Yes€324.59
B740DC-M1A-2525 psi1/2"3/4"7.375"7.375"Yes€311.97
A740FG-M2L-2525 psi1.5"1.5"9.25"9.25"No€548.89
B740EF-M1A-2525 psi1"1.25"8.125"8.125"Yes€393.55
B740GF-M1A-2525 psi2"2"10.25"10.25"Yes€857.12
B740FG-M1A-2525 psi1.5"1.5"9.25"9.25"Yes€557.13
A740FH-M2L-2525 psi1.25"1.5"9.25"9.25"No€465.33
B740FH-M1A-2525 psi1.25"1.5"9.25"9.25"Yes€465.08
A740DF-M2L-2525 psi3/4"1"7.375"7.375"No€318.85
B740GF-M1A-3030 psi2"2"10.25"10.25"Yes€857.12
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MCDONNELL & MILLER -

Relief Valves

MCDONNELL & MILLER 260-1 1/2-30A
MCDONNELL & MILLER 250-3/4-30B
StyleModelPrice (ex. VAT)
A260-1 1/2-30€2,416.69
B250-3/4-30€415.00
KUNKLE -

Series 333S Safety Relief Valves

KUNKLE 333SUC02-KCA
StyleModelPrice (ex. VAT)
A333SUC02-KC€3,150.35
RFQ
A333SUA01-KC€2,163.76
RFQ
A333SUA02-KC€2,163.76
RFQ
A333SUC01-KC€3,150.35
RFQ
KUNKLE -

Series 338 Blower Relief Valves

KUNKLE 0338-H01-NMA
StyleModelPrice (ex. VAT)
A0338-H01-NM€443.96
RFQ
A0338-H01-NM0018€443.96
RFQ
A0338-H01-NM0030€443.96
RFQ
A0338-H02-NM€443.96
RFQ
A0338-H01-NM0025€443.96
RFQ
KUNKLE -

Series 537 Safety relief Valves

KUNKLE 0537-H01-HM0030A
StyleModelPrice (ex. VAT)
A0537-H01-HM0030€1,046.00
RFQ
A0537-E01-HM0160€400.24
RFQ
A0537-G01-HM0060€770.21
RFQ
A0537-E01-HM0090€400.24
RFQ
A0537-E01-HM0045€400.24
RFQ
A0537-G01-HM0100€770.21
RFQ
A0537-G01-HM0030€770.21
RFQ
A0537-E01-HM0060€400.24
RFQ
A0537-E01-HM0030€400.24
RFQ
A0537-H01-HM0015€1,046.00
RFQ
A0537-H01-HM0130€1,046.00
RFQ
A0537-H01-HM0060€1,046.00
RFQ
A0537-G01-HM0160€770.21
RFQ
A0537-H01-HM0110€1,046.00
RFQ
A0537-H01-HM0036€1,046.00
RFQ
A0537-E01-HM0125€400.24
RFQ
A0537-H01-HM€1,046.00
RFQ
A0537-G01-HM€770.21
RFQ
A0537-E01-HM€400.24
RFQ
A0537-D01AHM€383.42
RFQ
A0537-H01-HM0125€1,046.00
RFQ
A0537-G01-HM0125€770.21
RFQ
KUNKLE -

Series 189 Safety Relief Valves

KUNKLE 0189-C01-KHA
StyleModelPrice (ex. VAT)
A0189-C01-KH€2,333.05
RFQ
A0189-C02-KH€2,333.05
RFQ
A0189-D01-KH€2,333.05
RFQ
A0189-D02-KH€2,333.05
RFQ
A189C-C01-KH€2,333.05
RFQ
A189P-D02-KH€2,697.41
RFQ
A189C-D01-KH€2,333.05
RFQ
A189P-C01-KH€2,697.41
RFQ
A189P-D01-KH€2,697.41
RFQ
KUNKLE -

Series 20P Safety Relief Valves

KUNKLE 020P-D01-MGA
StyleModelPrice (ex. VAT)
A020P-D01-MG€537.10
RFQ
A020P-J03-MG€3,677.96
RFQ
A020P-E01-MG€607.47
RFQ
A020P-K03-MG€5,213.73
RFQ
A020P-K01-MG€2,807.63
RFQ
A020P-D05-MG€1,022.46
RFQ
A020P-D03-MG€1,022.46
RFQ
A020P-D02-MG€537.10
RFQ
A020P-C03-MG€537.10
RFQ
A020P-C02-MG€537.10
RFQ
A020P-C01-MG€537.10
RFQ
A020P-H03-MG€2,381.26
RFQ
A020P-D04-MG€1,313.26
RFQ
A020P-H01-MG€1,179.76
RFQ
A020P-G01-MG€854.81
RFQ
A020P-F01-MG€735.80
RFQ
A020P-E03-MG€1,167.34
RFQ
A020P-C05-MG€537.10
RFQ
A020P-K02-MG€2,807.63
RFQ
A020P-J01-MG€1,763.44
RFQ
A020P-G03-MG€1,943.50
RFQ
A020P-E02-MG€607.47
RFQ
A020P-G02-MG€854.81
RFQ
KUNKLE -

Series 930 Safety Relief Valves

KUNKLE 0930-J01-GCA
StyleModelPrice (ex. VAT)
A0930-J01-GC€724.42
RFQ
A0930-J01-GC0015€724.42
RFQ
A0930-K01-GC0015€968.65
RFQ
A0930-H01-GC€393.25
RFQ
A0930-K01-GC€968.65
RFQ
A0930-K02-GC€904.49
RFQ
KUNKLE -

Series 389 Safety Relief Valves

KUNKLE 389C-C01-NHA
StyleModelPrice (ex. VAT)
A389C-C01-NH€5,222.18
RFQ
A389P-C01-KH€5,696.41
RFQ
A389P-D01-NH€5,696.41
RFQ
A389P-C01-NH€5,696.41
RFQ
A389C-C01-KH€5,222.18
RFQ
A389C-D01-KH€5,222.18
RFQ
A389C-D01-NH€5,222.18
RFQ
A389P-D01-KH€5,696.41
RFQ
KUNKLE -

Series 40RL Safety Relief Valves

KUNKLE 40RL-D01-PEA
StyleModelPrice (ex. VAT)
A40RL-D01-PE€1,081.88
RFQ
A40RL-C01-PE€1,081.88
RFQ
KUNKLE -

Series 600 Safety Relief Valves

KUNKLE 600NFF01-LSA
StyleModelPrice (ex. VAT)
A600NFF01-LS€5,336.88
RFQ
A600NGF01-KS€5,626.64
RFQ
A600NPM01-KS€26,069.66
RFQ
A600NPM01-LF€32,177.52
RFQ
A600NQP01-AF€45,731.35
RFQ
A600NQP01-KS€37,038.36
RFQ
A600NQP01-LF€45,731.35
RFQ
A600NQP01-LS€37,038.36
RFQ
A600NFF01-AF€6,654.28
RFQ
A600NFF01-KS€5,336.88
RFQ
A600NFF01-LF€6,654.28
RFQ
A600NGF01-AF€7,067.20
RFQ
A600NGF01-LF€7,067.20
RFQ
A600NNM01-LS€22,052.26
RFQ
A600NGF01-LS€5,626.64
RFQ
A600NHG01-KF€8,956.89
RFQ
A600NHG01-LF€8,956.89
RFQ
A600NHG01-LS€7,436.65
RFQ
A600NJG01-KF€10,616.83
RFQ
A600NFF01-AS€5,336.88
RFQ
A600NGF01-AS€5,626.64
RFQ
A600NFF01-KF€6,654.28
RFQ
A600NGF01-KF€7,067.20
RFQ
A600NHG01-KS€7,436.65
RFQ
A600NPM01-AF€32,177.52
RFQ
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KUNKLE -

Series 140 Liquid Relief Valves

KUNKLE 0140-C02-MEA
StyleModelFactory Set PressureInlet SizePressure RangePrice (ex. VAT)
A0140-C02-ME---€696.22
RFQ
A0140-B02-ME---€696.22
RFQ
A0140-B01-ME---€696.22
RFQ
A0140-C01-ME---€696.22
RFQ
A0140-B01-ME002525 psi3/8"0 to 25 psi€993.08
A1133405525 psi1/2"0 to 25 psi€528.16
A0140-B01-ME005050 psi3/8"0 to 50 psi€993.08
A1133405650 psi1/2"0 to 50 psi€963.88
A11334052100 psi3/8"0 to 100 psi€993.08
A11334057100 psi1/2"0 to 100 psi€963.88
A11334053200 psi3/8"0 to 200 psi€993.08
A11334058200 psi1/2"0 to 200 psi€963.88
A11334054300 psi3/8"0 to 300 psi€993.08
A11334059300 psi1/2"0 to 300 psi€963.88
KUNKLE -

Series 6254 Safety Relief Valves

KUNKLE 6254KNM02-GSA
StyleModelPrice (ex. VAT)
A6254KNM02-GS€7,371.45
RFQ
A6254FJH01-GS€2,585.13
RFQ
A6254KQP01-GS€14,133.36
RFQ
A6254KPM01-GS€9,633.70
RFQ
A6254FMM01-GS€4,852.55
RFQ
A6254FMK01-GS€4,425.15
RFQ
A6254FLM01-GS€3,998.78
RFQ
A6254FLK02-GS€3,780.42
RFQ
A6254FLK01-GS€3,780.42
RFQ
A6254FLJ01-GS€3,468.92
RFQ
A6254FKK01-GS€2,967.00
RFQ
A6254FKH01-GS€2,609.97
RFQ
A6254FJJ01-GS€2,641.01
RFQ
A6254AMK02-GS€4,425.15
RFQ
A6254AJG02-GS€2,297.43
RFQ
A6254AMK01-GS€4,425.15
RFQ
A6254ALJ01-GS€3,468.92
RFQ
A6254AKH02-GS€2,609.97
RFQ
A6254AKH01-GS€2,609.97
RFQ
A6254AJG01-GS€2,297.43
RFQ
A6254KNM01-GS€7,371.45
RFQ
A6254FLM02-GS€3,998.78
RFQ
A6254FLJ02-GS€3,468.92
RFQ
A6254FKJ01-GS€2,909.05
RFQ
A6254FJG01-GS€2,297.43
RFQ
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BLACOH INDUSTRIES -

Sentinel Series, Pressure Relief Valves

BLACOH INDUSTRIES PR-100-PVDF-TA
StyleModelInlet SizeInlet TypeMax. PressureNon Wetted MaterialWetted MaterialsPrice (ex. VAT)
APR-100-PVDF-T1"Fnpt150 psiPVCPVDF€1,269.34
RFQ
APR-100-PP-T-BSP1"BSP150 psiPVCPolypropylene€692.07
RFQ
APR-150-SS-T1-1/2"Fnpt150 psiPVCStainless Steel€3,101.41
RFQ
APR-049-PVC-T1/2"Fnpt150 psiPVCPVC€274.89
RFQ
APR-050-PVDF-T1/2"Fnpt150 psiPVCPVDF€981.52
RFQ
APR-050-SS-T1/2"Fnpt150 psiPVCStainless Steel€987.98
RFQ
APR2P-049-PVDF-T1/2"Fnpt150 psiPVCPVDF€753.53
RFQ
APR-025-PVC-T-SW1/4"Socket Weld150 psiPVCPVC€271.66
RFQ
APR-025-SS-T1/4"Fnpt150 psiPVCStainless Steel€734.12
RFQ
APR-200-PVC-T-L2"Fnpt50 psiPVCPVC€1,581.43
RFQ
APR-075-SS-T3/4"Fnpt150 psiPVCStainless Steel€1,025.18
RFQ
APR-075-SS-T-H3/4"Fnpt350 psiStainless SteelStainless Steel€1,482.79
RFQ
APOLLO VALVES -

14-200 Series Low Pressure Steam Safety Valves

APOLLO VALVES 1420508A
StyleModelInlet SizeOutlet SizeOverall HeightPrice (ex. VAT)
A14205082"2"7.13"€327.85
A14206082.5"2.5"8.25"€900.81
A14207083"3"9.375"€1,113.62
APOLLO VALVES -

14-400 Series Low Pressure Air Relief Valves

APOLLO VALVES 1440608A
APOLLO VALVES 144076P5B
APOLLO VALVES 1440504C
StyleModelPrice (ex. VAT)
A1440608€1,484.08
A1440514€890.44
B144076P5€1,823.24
A1440705€960.02
A1440722€1,823.24
A1440505€472.00
C1440504€890.44
A1440506€890.44
A1440507€890.44
A1440508€890.44
A1440509€890.44
A1440510€890.44
C1440511€897.56
A1440512€897.56
A1440718€1,823.24
A1440513€890.44
A1440516€890.44
A1440515€890.44
A1440514P5Q€950.39
A1440518€890.44
B1440517€890.44
A1440520€890.44
A1440522€890.44
A1440605€792.02
A1440606€1,484.08
See more
APOLLO VALVES -

14-500 Series Low Pressure Air Relief Valves

APOLLO VALVES 1450504A
APOLLO VALVES 1450510XB
APOLLO VALVES 1450605C
StyleModelItemPrice (ex. VAT)
A1450504Air Relief Valve€915.91
A1450513Air Relief Valve€915.91
A1450505Air Relief Valve€496.00
A1450512Air Relief Valve€915.91
A1450520Air Relief Valve€915.91
A1450510Air Relief Valve€915.91
A1450508Air Relief Valve€915.91
A1450507Air Relief Valve€915.91
B1450510XAir Relief Valve€1,149.56
A1450612Relief Valve€1,526.48
A1450710Relief Valve€999.91
A1450714Relief Valve€1,886.92
A1450713Relief Valve€1,886.92
A1450715Relief Valve€1,886.92
A1450615Relief Valve€1,526.48
A1450607Relief Valve€1,526.48
A1450609Relief Valve€1,526.48
C1450605Relief Valve€824.01
A1450521Relief Valve€915.91
A1450515Relief Valve€915.91
A1450516Relief Valve€915.91
A1450514P7Relief Valve€915.91
A1450717Relief Valve€1,886.92
APOLLO VALVES -

14-600 Series Vacuum Relief Valves

APOLLO VALVES 14605V09A
APOLLO VALVES 14605V20B
APOLLO VALVES 14606V18HVC
StyleModelPrice (ex. VAT)
A14605V09€954.07
A14605V15€954.07
A14606V12Q€1,628.74
A14605V12€954.07
A14605V11€954.07
A14605V08€954.07
A14605V10€527.89
A14605V13€954.07
A14605V12Q€1,010.04
A14605V14€954.07
B14605V20€954.07
A14605V24€954.07
A14605V17€954.07
A14606V08€1,568.81
A14606V12€1,568.81
A14606V11€1,568.81
A14606V13€1,568.81
A14606V15€1,568.81
C14606V18HV€1,568.81
A14606V25€1,568.81
A14606V30€1,568.81
A14605V30€954.07
A14605V25€954.07
A14605V14Q€1,014.00
A14606V17€1,568.81
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APOLLO VALVES -

15 Series ASME Air Relief Valves

APOLLO VALVES 15119B125CEQA
APOLLO VALVES 15117B80B
StyleModelPrice (ex. VAT)
A15119B125CEQ€393.19
B15117B80€218.31
A15112B50Q€165.80
A15112B100Q€165.80
A15112B125Q€165.80
A15112B130Q€165.80
B15112B90€91.09
A15117B150€218.31
A15117B61€218.31
A15117B60X€458.03
A15117B61CE€244.65
A15117B70€218.31
B15117B73€218.31
A15117B65€218.31
B15117B75€218.31
B15112B240CE€129.87
A15117B77€218.31
A15117B80X€458.03
B15117B90CE€248.28
A15117B95€218.31
B15118B100€248.57
A15118B105€248.57
B15118B110€248.57
A15118B115€248.57
A15118B116€248.57
See more
APOLLO VALVES -

16 Series General Purpose Pressure Relief Valves

APOLLO VALVES 1620202A
StyleModelPrice (ex. VAT)
A1620202€54.81
A1620305€53.17
APOLLO VALVES -

16-501 Series Cast Bronze Adjustable Relief Valves

APOLLO VALVES 1650102A
APOLLO VALVES 1650101B
StyleModelBody MaterialDisc MaterialFactory Set PressureInlet TypeOutlet TypePressure RangeSeat MaterialTemp. RangePrice (ex. VAT)
A1650102BronzeNitrile250 psiMNPTFNPT250 to 600 psiNitrile0° to 200° F€69.18
B1650101Cast BronzeNitrile60 psiFnptMnpt50 to 250 psiNitrile0 Degrees to 200 Degrees F€69.05
B1650125Cast BronzePTFE60 psiFnptMnpt50 to 250 psiPTFE0 Degrees to 200 Degrees F€68.96
B1650160Cast BronzePTFE250 psiFnptMnpt250 to 600 psiPTFE0 Degrees to 200 Degrees F€69.18
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Features

  • Kunkle safety and pressure relief valves open at a specific pressure to protect pumps and pipelines from exceeding stress limits.
  • These relief valves have an aluminium / bronze / stainless steel body with a stainless steel seat for leak-proof performance.
  • They can handle pressures up to 5500 psi.
  • The brand's bronze safety relief valves feature an MNPT inlet and FNPT outlet with outlet size being greater than the inlet size to relieve pressure. They are equipped with a test lever to lower or raise the pressure between 3 and 300 PSI.
  • Kunkle stainless steel relief valves feature a precisely calibrated spring mechanism, ensuring accurate pressure release according to specific system requirements. They can operate at temperatures ranging from -60 to 406 degrees F. These safety and pressure relief valves are equipped with a PTFE seat, providing reliable sealing to prevent any leakage, even under high-pressure scenarios.

Working Mechanism

  • As the pressure within the system rises, it reaches a predetermined set pressure.
  • At this set pressure, the force exerted by the pressurised fluid becomes greater than the force exerted by the spring mechanism inside the valve.
  • The force imbalance causes the valve's disc or poppet to lift off its seat, creating an opening.
  • The opening allows the pressurised fluid to escape from the system through the valve.
  • As the fluid exits through the valve, the pressure within the system starts to decrease.
  • Once the pressure decreases to a safe level, the spring's force becomes greater than the fluid force, causing the valve to close the opening.
  • By releasing excess pressure, the safety relief valve prevents any damage to the system, equipment or personnel that could result from an overpressure event.

Frequently Asked Questions

What is the purpose of a test lever in the relief valve?

The temperature and pressure relief valve comes with a test lever that allows pressure checks during operation.

What is the importance of the pressure setting in Kunkle relief valves?

Pressure setting determines when the valve opens, preventing overpressure scenarios. Accurate settings are a must for system safety.

What factors should be considered when selecting a pressure relief valve?

Important factors include the system's maximum pressure, flow rate, temperature and the type of fluid being used.

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