Trunnion Mounted Ball Valve

Key Specifications / Features

In a trunnion mounted ball valve, the ball is supported by the stem and trunnion, reducing the operating torque, while the seats are spring loaded. The ball will not move and the seats move with the medium pressure to tight the ball and seal ring to ensure sealing reliability. Trunnion mounted ball valves are widely used in oil & gas industry.

Product Specifications

Ball Valve Type	Trunnion Mounted Ball Valve
Body Construction	Bolted Body/Welded Body/Top Entry
Body Material	Carbon Steel, Stainless Steel, Duplex Steel (Forged & Cast Steel)
Seat	Soft Seat: PTFE, Nylon, PEEK, PPL, Delrin, Devlon etc.
	Metal Seated: Stellite, Tunsten Carbide, Chrome Carbide
Size Range	1-1/2”-56” (DN40-DN1400)
Class Rating	ANSI Class 150-2500 (PN20-PN420)
End Connection	Butt Welding, Flanged, Hub
Operator	Lever, Worm Gear, Electric, Penumatic, Etc.
Industry Servered	Oil, Gas, Power Gerneration

Standard Specifications

Design and Manufacture	API 6D
Wall Thickness	API 6D
Face-to-Face Dimension	API 6D
Flange End Dimension	ANSI/ASME B16.5 (1” to 24”)
	ANSI/ASME B16.47 (26” & up)
Butt-Weld End	ANSI/ASME B16.25
Inspection & Testing	API 6D/API 598
Fire Safe Design	API 607/BS 6755
Material	Nace MR 0175

Trunnion Mounted Ball Valve Drawing

Material Specifications

No.	Name of Part	A105/ENP	A105/F316 Nace	LF2/F316	F316/F316
1	Nut	ASTM A194 2H	ASTM A194 2HM	ASTM A194 7	ASTM A193 B8
2	Bolt	ASTM A193 B7	ASTM A193 B7M	ASTM A320 L7	ASTM A182 F316
3	Bonnet	ASTM A105	ASTM A105	ASTM A320 LF2	ASTM A182 F316
4	Gasket	SS304+Graphite	SS316+Graphite	SS316+Graphite	SS316+Graphite
5	O-Ring	Viton AED	Viton AED	Vion AED	Vion AED
6	O-Ring	Viton AED	Viton AED	Vion AED	Vion AED
7	Graphite	SS304+Graphite	SS316+Graphite	SS316+Graphite	SS316+Graphite
8	Spring	Inconel X-750	Inconel X-750	Inconel X-750	Inconel X-750
9	Seat Ring	ASTM A105	ASTM A182 F316	ASTM A182 F316	ASTM A182 F316
10	Pin	Carbon Steel	Stainless Steel	Stainless Steel	Stainless Steel
11	Trunnion	ASTM A105	ASTM A182 F316	ASTM A182 F316	ASTM A182 F316
12	Bearing	Carbon Steel+Graphite	Carbon Steel+Graphite	Carbon Steel+Graphite	Carbon Steel+Graphite
13	Gasket	SS304+Graphite	SS316+Graphite	SS316+Graphite	SS316+Graphite
14	Ball	ASTM A105+ENP	ASTM A182 F316	ASTM A182 F316	ASTM A182 F316
15	Drain Plug	Carbon Steel	Carbon Steel	Stainless Steel	Stainless Steel
16	Ring	ASTM A105+ENP	Stainless Steel	Stainless Steel	Stainless Steel
17	Seal Ring	Viton AED	Viton AED	Viton AED	Viton AED
18	Seat Ring	PTFE, Nylon, PEEK	PTFE, Nylon, PEEK	PTFE, Nylon, PEEK	PTFE, Nylon, PEEK
19	Feet	Carbon Steel	Carbon Steel	Carbon Steel	Carbon Steel
20	Injection Valve	Carbon Steel	Stainless Steel	Stainless Steel	Stainless Steel
21	Lifting Lug	Carbon Steel	Stainless Steel	Stainless Steel	Stainless Steel
22	Body	ASTM A105	ASTM A105	ASTM A320 LF2	ASTM A182 F316
23	Safety Valve	Carbon Steel	Carbon Steel	Carbon Steel	Carbon Steel
24	Relief Valve	Carbon Steel	Carbon Steel	Stainless Steel	Stainless Steel
25	Trunnion Bearing	Carbon Steel+Graphite	Carbon Steel+Graphite	Carbon Steel+Graphite	Carbon Steel+Graphite
26	Stem	ASTM A182 F6A	ASTM A182 F316	ASTM A182 F316	ASTM A182 F316
27	Key	Carbon Steel	Carbon Steel	Carbon Steel	Carbon Steel
28	Thrust Washer	PTFE	PTFE	PTFE	PTFE
29	O-Ring	Viton AED	Viton AED	Vion AED	Vion AED
30	Stuffing Box	ASTM A105	ASTM A105	ASTM A350 LF2	ASTM A193 B8
31	Bolt	ASTM A193 B7	ASTM A193 B7M	ASTM A320 L7	ASTM A193 B8
32	Packing	SS304+Graphite	SS316+Graphite	SS316+Graphite	SS316+Graphite
33	Adapter	ASTM A105	ASTM A105	ASTM A105	ASTM A182 F316
34	Bolt	ASTM A193 B7	ASTM A193 B7M	ASTM A320 L7	ASTM A193 B8
35	Nut	A194 2H	A194 2HM	ASTM A194 7	ASTM A194 8
36	Bolt	ASTM A193 B7	ASTM A320 L7	ASTM A193 B8	ASTM A193 B8
37	Worm Gear	Ductile Iron	Ductile Iron	Ductile Iron	ASTM A194 8

Trunnion Mounted Ball Valve Price List – Feb. 2021

Size	Class 150	Class 300	Class 600	Class 900	Class1500
2″	$235	$265	$388	$536	$603
3″	$324	$587	$725	$969	$1,111
4″	$465	$818	$1,051	$1,331	$1,612
6″	$1,515	$1,655	$2,332	$2,802	$3,505
8″	$2,455	$2,685	$3,478	$4,154
10″	$4,038	$4,436	$5,605	$6,698
12″	$6,066	$6,722	$8,472
14″	$7,702	$8,936	$11,784
16″	$12,015	$13,236	$16,804

Trunnion Mounted Ball Valve Design Features

Basic Feature:-2 Piece or 3 Piece body, trunnion mounted ball valve
-Tight shut off sealing mechanism
-Low operation torque
-Fire safe tested
-Blowout-proof ball seat and stem
-Anti-static design
-Locking device for lever and gear operated
-ISO 5211 top mounting pad for actuator
Trunnion Ball Valve Double block and bleed (DBB)Double Block: When the ball is in the closed position, each seat seals off the process medium independently at the same time between the up/down stream.
Bleed/Self Cavity Relief (Self Relieving Seat): The trunnion mounted ball valve may trap the media in the body cavity when the operator closes the valve. The trapped fluid expands and the pressure increases in the cavity when heated. If the cavity pressure gets 1.33 times of the line pressure, the trapped fluid will push the seat of the downstream side away from the ball by rising pressure against the spring load. When this happens, the pressure gets released.

Trunnion Mounted Ball Valve, Double Block & Bleed.Typical application: Pipeline ball valves in liquid services, to prevent pressure buildup in body cavity due to change in temperatures.Secondary Metal to Metal Seat DesignStandard seat design is primary soft seal, and secondary metal to metal seal. Seat insert is designed as pressed-in type which is easy for maintenance. Optional design with primary metal to metal seal and secondary soft seal seat design is also available upon request.

Double Piston Effect Seats-(DPE*DPE) Optional
Double Piston Effect  seats are designed to be pushed against the ball in both cases, whether pressure comes from body cavity or from upstream/ downstream side. Ball valve with DPE seats cannot perform cavity relief. For such reason -in liquid services- the use of a relief valve is recommended.

Typical application: Whenever it is necessary to create an additional safe barrier between the upstream and the downstream sides. Recommended in welded body valves, where seats maintenance is not foreseen.Combined SPE-DPE (Optional)Upstream SPE seat ensures self relieving capability, while downstream DPE seat grants the double barrier in case of upstream seat damage. This configuration involves a preferred direction of installation with SPE seat facing upstream. With SPE-DPE configurations, cavity relief always takes place through SPE seat.

Typical application:
Riser valves, pig launchers/receivers. DPE seat gives double isolation to the pig trap, allowing automaticrelief of body cavity at the same time in case of pressure build up.

Emergency Sealant Injection System
Each ball valve of size 6” and larger (or smaller size on request), is equipped with sealant injection located at stem and seats area. The injection is integrated with check valve to provide backup sealing, also a check valve is equipped at front of seat sealant injection to avoid blowing out in case wrong operation. When the soft sealing materials (seat inserts and o-rings) are damaged and leakage happened by fire or other accident, the sealant can be injected through the injection fittings.

Blow-out Proof Stem
The stem is made separately from the ball with integral T-type round shoulder, retained by gland.

Anti-static Device
Spring plus graphite type anti-static device are applied between the ball, stem, gland flange and body, to keep the electrical continuity between all the metallic components, and ensure the resistance lower than the most severe service requirement.Welcome to contact us for trunnion mounted ball valve price,  we will quote you best price within 2 days with technical support.Why Trunnion Mounted Ball ValveTrunnion mounted ball valves are quarter-turn valves used to stop or start the flow of a media in a pipe.

Trunnion mounted ball valve is TMBV ball valves in short, also called trunnion supported ball valve or trunnion ball valve. In a trunnion mounted ball valve, the ball is supported by the stem and trunnion, reducing the operating torque, while the seats are spring loaded. The ball will not move and the seats move with the medium pressure to tight the ball and seal ring to ensure sealing reliability.Trunnion mounted ball valves from China trunnion mounted ball valve manufacturers are generally manufactured with the features of double block and bleed (DBB), cavity relief, bi-directional, fire safe and secondary metal to metal seated etc. The DBB design can block both upstream and downstream media. And when the pressure in the middle cavity is greater than the seat spring force, the seat will be pushed open to release the pressure inside the chamber to ensure safety.As trunnion mounted ball valve manufacturers & suppliers,  Relia supplies trunnion mounted ball valves that are 100% under hydraulic and pneumatic test before leave the factory. The trunnion mounted ball valve price is mainly based on the material specification & construction, Relia trunnion mounted ball valve price is atrractive compared with its performance.