1.API 7K standard
2.Stem-guided Valves
3.They perform well in modern drilling
4.high temperature tolerance 

Forged alloy steel AISI 4119 construction
Heavy-duty valve design
Deep carburized wear surfaces
Heavy-duty durable retainer threads
Precise machined to API standards
Taper post-heat treat machined to remove warpage
Available in sizes to fit all major mud pumps Offer an expansive range of valves and seats such as Premium Cross Arms Valve and Seat,Arms valve and seat,Full-open Valve and seat,Long-life Bonded Valve with Urethane,Long-life valve with Urethane.Wide choice of options available for requirements not met by hardened or stainless steel valves and elastomer-insert valve seats.