Kunkle 911 Safety Relief Valve — 1/2″ x 1″ NPT, D Orifice (Liquid ASME Section VIII, Metal Seat)
SKU: KUN-911-DM-J-1_2X1
The Kunkle 911 is a full-nozzle safety relief valve with all-stainless construction for cryogenic and corrosive service, built for air and gas compressors, liquid-filled pressure vessels, steam systems and vacuum service. This 1/2″ x 1″ NPT variant — D orifice, 0.121 in² — is available across a 15–1400 PSI range for Liquid ASME Section VIII service with a metal seat, carrying ASME Section VIII (UV stamp), National Board Certified. Temperature range -320°F to 800°F; threaded side outlet allows piped-off discharge to eliminate fugitive emissions. Specify your required set pressure when requesting a quote.
Specifications
| Body Material | Stainless Steel (SA351-CF8M) |
| Trim Material | Stainless Steel (316) |
| Inlet Size | 1/2" NPT |
| Outlet Size | 1" NPT |
| Outlet Configuration | Side outlet |
| Orifice Designation | D |
| Orifice Area | 0.121 in² |
| Set Pressure | 15–1400 PSI |
| Temperature Range | -320°F to 800°F |
| Capacity — Liquid (GPM) | 14–128 |
| Flow Coefficient | 0.710 |
| Service Media | Liquid |
| ASME Certification | ASME Section VIII (UV stamp), National Board Certified |
| National Board Certified | Yes |
| Seat Type | Metal |
| Weight | 3 lb |
| Overall Height | 7-1/4 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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