Black Nut Grey Subs
A precision metal-to-metal seal plus O-ring seal which allows for misalignment and provides a positive seal with up to 7 1/2º pipe misalignment. Ideal for air, water, gas, oil and mud service to 10,000 psi NSCWP*. 7,500 psi CWP for 4” and 5” sizes.
Hammer unions are available in a wide range of sizes and in working pressures to 20,000 psi. Pressure seal, non-pressure seal, and welded styles are offered in various sizes and pressures. All SPM hammer unions provide pressure-tight, positive sealing and are available for standard service and sour gas models. SPM hammer unions for sour gas service are specially heat-treated for controlled hardness and utilize fluorocarbon elastomer seal rings.