DBB Ball Valve

The trunnion mounted DBBball valve has two floating seats with springs loaded, in which the trunnionball is fixed at two pivot points, and the process pressure pushes the upstreamseat against the ball's sealing surface. This design applies continuouspressure against a trunnion mounted ball after the ball is installed. Thetrunnion mounted ball valve is one kind of widely used oil and gas industryvalves.

API 6DDBB ball valve usually designed with 3pcs forged steel body construction. The API 6D DBB ball valvewith two balls in one pc ball valve body to achieve a positive sealing in acompact design. Thefamily of API 6D trunnion mounted ball valve is classified into 3pcs forgedbody Trunnion Valve, 2pcs cast steel body Trunnion Ball Valve, and one pc forged body topentry trunnion ball valve. The one pc forged body top entry trunnion ball canavoid the leaking risk from the connection between body and closure. The otheradvantage of top entry ball valve design is it makes the emergency on-linemaintenance to be easier and quicker, because the valve ball needn’t to beremoved from pipe line. The 3pcs forged steel trunnion type of ball valves aremost widely used trunnion ball valve of oil and gas industry valves becauseit's reliability and economy.

Standard:

BasicDesign: API 6D, ASME B16.47

Face toFace: ASME B16.10, API6D

Flange Ends:ASME B16.5, ASME B16.47

BWEnds: ASME B16.25

PressureTest: API 6D, API 598

FireSafety: API 607, API 6Fa

Design Feature:

1pcForged Steel Body, Two Balls Inside, Twin Balls Inside

TrunnionMounted Ball

Blow-outProof Stem

Anti-StaticDevice

FireSafety Design

EmergencySealant Injector

DBB,DPE, SPE, Double Block and Bleed.

Size Range: 2"to 48"

Pressure Class: Class150 to Class 2500

Material:

Body:A105N, LF2, F304, F316, F51

Ball:A105N+ENP, LF2+ENP, F304, F316, F51

Shaft:A105N+ENP, LF2+ENP, F304, F316, 17-4PH

SeatInsert: PTFE, RPTFE, NYLON, PEEK

Operation:

Lever,Gear, Pneumatic Actuator

Optional:

StemExtension, 3mm Thickness SS316 Overlay Seat Pocket

LockableDevice, AED O-Ring, NACE MR 01-75

InorganicZinc Painting, Carboline