Kunkle 6030 Safety Relief Valve — 1/2″ NPT, D Orifice (Steam ASME Section I, Metal Seat)
SKU: KUN-6030-DM-A-1_2
The Kunkle 6030 is a full-nozzle safety relief valve with stainless steel trim (nozzle and disc) for steam boilers, air compressors, and pressure vessels. This 1/2″ NPT inlet variant — D orifice, 0.121 in² — is available across a 15–300 PSI set pressure range for Steam ASME Section I service with a Metal seat, carrying ASME Section I (V stamp), National Board Certified. Body: bronze (BRZ B584-C84400); side outlet configuration with dual control rings for precise blowdown adjustment. Specify your required set pressure when requesting a quote.
Specifications
| Body Material | Bronze (BRZ B584-C84400) |
| Trim Material | Stainless Steel (nozzle SA351-CF8 / disc SA479) |
| Inlet Size | 1/2" NPT |
| Outlet Size | 3/4" NPT |
| Outlet Configuration | Side outlet |
| Orifice Designation | D |
| Orifice Area | 0.121 in² |
| Set Pressure | 15–300 PSI |
| Temperature Range | -60°F to 425°F |
| Capacity — Steam I | 173–1771 |
| Flow Coefficient | 0.878 |
| Service Media | Steam |
| ASME Certification | ASME Section I (V stamp), National Board Certified |
| National Board Certified | Yes |
| Seat Type | Metal |
| Weight | 1-1/2 lb |
| Overall Height | 6-1/2 in |
Need a quote or have a technical question?
Call (324) 888-1524 or submit a quote request online. Requests received before 3 PM ET are typically quoted the same business day.
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