Model Descriptions: Model 19: All bronze, equipped with handwheel for easy adjustment within spring ranges. Model 19M: Same as model 19 except SS trim (seat and disc). Available 2-1/2" and 3" only. For higher pressure settings or severe applications. Model 20: All bronze, with pressure-tight cap. Suitable for maximum back pressure of 50 psig.1 Model 20M: Same as model 20 except SS trim. Available in 2-1/2" and 3" only (seat and disc). For higher pressure settings or severe applications. Maximum back pressure of 50 psig.1 Model 20P: Same as model 20 except with packed lift lever. Suitable for maximum back pressure of 50 psig. (Back pressure increases set pressure on a one to one basis, and reduces capacity. Back pressure in excess of 10% of set pressure is not recommended.) Model 20MP: Same as model 20M except with packed lift lever. Maximum back pressure of 50 psig.1 Model 200A: Special non-chattering design. Recommended for light oils and continuous by-pass or pressure regulation. UL842 listed for light oil service. Available 3/4" to 1-1/2" sizes. Female NPT connections only. Model 200H: Same as model 20. UL842 listed for use with fuel oils. Available 3/4" to 2" sizes.
Features & Benefits:
Both inlet and outlet connections are cast integral with body to permit easy inspection and servicing without disconnecting piping.
Beveled seats lapped for optimum performance.
Stainless Steel (SS) spring for optimum corrosion resistance.
Each Kunkle valve is tested and inspected for pressure setting and leakage.
Specifications
Pressure and Temperature Limits: Models 19, 20: 1 psig to 300 psig -60°F to 406°F Models 19M, 20M: 1 psig to 500 psig -60°F to 406°F Models 200A, 200H: 1 psig to 200 psig -60°F to 406°F
