Kunkle 911 Safety Relief Valve — 1-1/4″ x 1-1/4″ NPT, E Orifice (Vacuum, Metal Seat)
SKU: KUN-911-EM-Q-1_1_4X1_1_4
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 1-1/4″ x 1-1/4″ NPT variant — E orifice, 0.216 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 | Stainless Steel (SA351-CF8M) |
| Trim Material | Stainless Steel (316) |
| Inlet Size | 1-1/4" NPT |
| Outlet Size | 1-1/4" NPT |
| Outlet Configuration | Side outlet |
| Orifice Designation | E |
| Orifice Area | 0.216 in² |
| Set Pressure | 6–29 in Hg |
| Temperature Range | -30°F to 250°F |
| Capacity — Vacuum (SCFM) | 43–51 |
| Flow Coefficient | 0.878 |
| Service Media | Vacuum (Air) |
| ASME Certification | Non-code — no ASME stamp |
| National Board Certified | No |
| Seat Type | Metal |
| Weight | 4 lb |
| Overall Height | 8 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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