Description
All-Stainless Liquid Relief Valve with FNPT Connections for Non-Code Applications
The Kunkle Model 140 is a general-utility liquid relief valve constructed entirely of stainless steel: body, bonnet, disc, nozzle, and spring. This makes it well-suited for non-code liquid systems where corrosion resistance and fluid purity matter. This valve is set to 30 psig with a rated capacity of 2.1 GPM at 25% accumulation, and features a ½ in. FNPT inlet and ½ in. FNPT outlet. The angle-lapped seat and PTFE O-ring and gasket wetted components provide tight shutoff and resist leaching into sensitive process fluids such as deionized water or water-glycol solutions used in liquid cooling systems.
Its compact form is perfect for installations with limited space such as coolant distribution units, pump skids, and manifold assemblies. Back pressure up to 50 psig (3.45 barg) is permissible, but back pressure more than 10% of set pressure increases set point on a one-to-one basis and reduces capacity. Each valve is factory tested for pressure setting and leakage prior to shipment.
Key specifications:
- Inlet / outlet: ½ in. FNPT x ½ in. FNPT
- Set pressure: 30 psig; pressure range available: 10–300 psig (0.69–20.7 barg)
- Rated capacity: 2.1 GPM at 25% accumulation
- Temperature range: -60°F to 406°F (-51°C to 208°C)
- Body and spring material: stainless steel (nozzle SS A582-303, bonnet/disc SS A743-CF8, spring SS A313-302)
- Wetted sealing materials: PTFE (o-ring and gasket)
- Maximum allowable back pressure: 50 psig (3.45 barg)
- Service: non-code liquid
Note: The image depicts the catalog standard inlet option, but this listing is for the Female NPT inlet option.
Custom PSI selections available. Call JME sales specialists at 1 (800) 333-3331
