Kunkle 912 Safety Relief Valve — 2″ x 3″ NPT, J Orifice (Vacuum, Metal Seat)
SKU: KUN-912-JM-Q-2X3
The Kunkle 912 is a full-nozzle safety relief valve with bronze body and bonnet with stainless steel warn ring and disc, built for air and gas compressors, liquid-filled pressure vessels, steam systems and vacuum service. This 2″ x 3″ NPT variant — J orifice, 1.415 in² — is available across a 6–29 in Hg range for Vacuum service with a metal seat, carrying Non-code — no ASME stamp. Temperature range -30°F to 250°F; threaded side outlet allows piped-off discharge to eliminate fugitive emissions. Specify your required set pressure when requesting a quote.
Specifications
| Body Material | Bronze (B584 Alloy 84400) |
| Trim Material | Brass (B16), 316 SS disc |
| Inlet Size | 2" NPT |
| Outlet Size | 3" NPT |
| Outlet Configuration | Side outlet |
| Orifice Designation | J |
| Orifice Area | 1.415 in² |
| Set Pressure | 6–29 in Hg |
| Temperature Range | -30°F to 250°F |
| Capacity — Vacuum (SCFM) | 284–335 |
| Flow Coefficient | 0.878 |
| Service Media | Vacuum (Air) |
| ASME Certification | Non-code — no ASME stamp |
| National Board Certified | No |
| Seat Type | Metal |
| Weight | 15 lb |
| Overall Height | 12-1/2 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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