Pff gear operated two way gate valve: According to the customer's request and the need of oil production, on basic of the pff slab gate valve, we have a new design in accordance with the api 6a specification strictly and then manufacture pff gear operated two way gate valve which with a lower indicator. Size: 2-1/16", 3-1/8", 3-1/16", 4-1/16", 5-1/8", 7-1/16" Wp:2000-15, 000psi Working temperature:l u, pu Material:aa-ff psl:1-4 pr:1-2