Trunnion Mounted DBB Ball Valve

RSF VALVE a leading manufactuer of oil and gas industry valves, we have more than 15year experience in producing API 6D forged steel DBB trunnion mounted ball valve (twin balls inside body). Our DBB double block and bleed ball valve has shorter face to face and compact construction. There are two balls and seat assembings inside one pc valve body.

The trunnion mounted DBB ball valve has two floating seats with springs loaded, in which the trunnion ball is fixed at two pivot points, and the process pressure pushes the upstream seat against the ball's sealing surface. This design applies continuous pressure against a trunnion mounted ball after the ball is installed. The trunnion mounted ball valve is one kind of widely used oil and gas industry valves. 

API 6D DBB ball valve usually designed with 3pcs forged steel body construction. The API 6D DBB ball valve with two balls in one pc ball valve body to achieve a positive sealing in a compact design. The family of API 6D trunnion mounted ball valve is classified into 3pcs forged body trunnion valve, 2pcs cast steel body trunnion ball valve, and one pc forged body top entry trunnion ball valve. The one pc forged body top entry trunnion ball can avoid the leaking risk from the connection between body and closure. The other advantage of top entry ball valve design is it makes the emergency on-line maintenance to be easier and quicker, because the valve ball needn’t to be removed from pipe line. The 3pcs forged steel trunnion type of ball valves are most widely used trunnion ball valve of oil and gas industry valves because it's reliability and economy.

Standard:

Basic Design: API 6D, ASME B16.47

Face to Face: ASME B16.10, API6D

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

BW Ends: ASME B16.25

Pressure Test: API 6D, API 598

Fire Safety: API 607, API 6Fa

Design Feature:

1pc Forged Steel Body, Two Balls Inside, Twin Balls Inside

Trunnion Mounted Ball

Blow-out Proof Stem

Anti-Static Device

Fire Safety Design

Emergency Sealant Injector

DBB, DPE, SPE, Double Blook and Bleed.

Size Range: 2" to 48"

Pressure Class: Class 150 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

Seat Insert: PTFE, RPTFE, NYLON, PEEK

Operation:

Lever, Gear, Pneumatic Actuator

Optional:

Stem Extension, 3mm Thickness SS316 Overlay Seat Pocket

Lockable Device, AED O-Ring, NACE MR 01-75

Inorganic Zinc Painting, Carboline

Thanks for your selection of RSF VALVE’s API 6D trunnion mounted DBB ball valve! If you have any inquiries of Twin balls DBB Ball Valve of Oil and gas industry valves, please don’t hesitate to call us or email us!