Kunkle Pressure Relief Valve 337 - 2"

The 337 Kunkle pressure relief valve can be purchased preset per your requirements up to a maximum pressure of 60 psig and a minimum pressure of 1 psig.
337 Kunkle Pressure Relief Valve Features:

• Large nozzle design provides high capacity.
• Flat bronze valve series are lapped for optimum performance.
• Warn ring offers easy adjustability for precise opening with minimum pre-open simmer and exact blower down control.
• Pivot Between disc and spring corrects misalignment and compensates for spring side thrust.
• A lift handle is provided for easy manual testing.
• Protects low to medium pressure blowers and compressors. It is well suited for positive displacement blowers.

337 Kunkle Pressure Relief Valve Connections:

• 2" MPT (Male Pipe Thread) fitting for mounting on system
• 2" FPT (Female Pipe Thread) fitting to allow for piping away the relief flow

Materials of Construction:

• Nozzle - Bronze, SB62
• Set Screw A108-1018 Brass Plated
• Regulator Ring - Bronze B584-C84400
• Disc - Bronze B584-C84400
• Spring Step - Steel A109 Coated
• Spring - SS A313-302
• Body - Cast Iron A-126, Class A or B
• Compression Screw - Bronze B584-C84400
• Stem - Brass B16
• Regulator Ring Set Screw - Brass B16

Weight: 8 lb (3.6 kg)
The 337 Kunkle Pressure Relief Valve will not have a code stamp or 'NB' on nameplate below 15 psig setting.
Capcities based on Air (SCFM)


The table below shows flow values in scfm at set points from 1 to 15 psig

Set Pressure psig	Volume (SCFM)
1	240
1.5	276
2	313
2.5	349
3	386
3.5	422
4	458
4.5	495
5	531
5.5	552
6	773
6.5	594
7	615
7.5	636
8	657
8.5	678
9	699
9.5	720
10	741
10.5	762
11	782
11.5	803
12	824
12.5	845
13	865
13.5	886
14	907
14.5	927
15	948