3.payment:T/T or L/C
4.delivery:within 20 days
5.Heavy-duty durable retainer threads
High performance valves and seats are available from DL with the following features: 1.Forged alloy steel AISI 4119 construction 2.Heavy-duty valve design 3.Deep carburized wear surfaces 4.Heavy-duty durable retainer threads 5.Precise machined to API standards 6.Taper post-heat treat machined to remove warpage
Various sizes are available to fit all major mud pumps. An extensive range of valve seats are offered,such as Premium Cross-Arms Valve and Seat,Three-arm Valve and Seat, Valve,Full-open Seat.Wide choices are available for requirements not met by hardened or stainless steel valves and elastomer- valve seats.