EnglishFrenchSpanishRussianArabicIndonesianThaiItalian

Trunnion-mounted Pneumatic Ball Valve

Parameters of Trunnion-mounted Pneumatic Ball Valve

BCST Trunnion-mounted Pneumatic Ball Valve is available in types of Two Piece Split Body and Three Piece Bolted Body. Two-Piece Trunnion mounted Reduced ball valve Designed and manufactured to the most updated international standards API 6D, ASME B16.34, BS 5351 or equivalents. With standard features of Fire Safe, Anti-static, and Blow-out.

The high-pressure type ball valve is designed for large type ethylene project and oil and gas storage and transportation and long-distance transportation (gas, oil). It adopts wing type seal valve seat and limit valve body connection, which not only meets the requirements of high pressure, high temperature, and other working conditions of large type ethylene project, but also can be widely used in petroleum, chemical industry, electric power, and other fields.

Trunnion-mounted Pneumatic Ball Valve

Description

Trunnion-mounted Pneumatic Ball Valve

BCST Trunnion-mounted Pneumatic Ball Valve is available in types of Two Piece Split Body and Three Piece Bolted Body. Two-Piece Trunnion mounted Reduced ball valve Designed and manufactured to the most updated international standards API 6D, ASME B16.34, BS 5351 or equivalents. With standard features of Fire Safe, Anti-static, and Blow-out.

The high-pressure type ball valve is designed for large type ethylene project and oil and gas storage and transportation and long-distance transportation (gas, oil). It adopts wing type seal valve seat and limit valve body connection, which not only meets the requirements of high pressure, high temperature, and other working conditions of large type ethylene project, but also can be widely used in petroleum, chemical industry, electric power, and other fields.

BCST Valves manufactures a comprehensive range of Trunnion Mounted Ball Valves in sizes up to56”( 1400mm)in ASME classes from 150 to 2500. The valves are offered in a variety of body styles, materials, trims, and actuation options to address critical services in hydrocarbon, power, and allied industries.

 

Range of Trunnion-mounted Pneumatic Ball Valve

 

Valve Type

ASME

Class

2 3 4 6 8 10 12 14 16 18 20 22 24 28 30 36 42 48 56
50 80 100 150 200 250 300 350 400 450 500 550 600 700 750 900 1050 1200 1400
 

 

 

2-piece

150
300
600
900
1500
2500
 

 

 

3-piece

150
300
600
900
1500
2500

Feature of Trunnion-mounted Pneumatic Ball Valve

Double Block and Bleed

BCST Valves offers Trunnion-mounted Ball Valves (TMBV) that conform to API 6D. The valve, in the closed position, blocks flow from both valve ends when the cavity between the seating surfaces is vented through a bleed connection provided on the body cavity.

Inbuilt Double Block & Bleed feature enables on-line affirmation of seat sealing. The seat rings float in the flow-axis against a fixed ball and line pressure forces the spring-loaded seats against the ball to affect the sealing.

Fire Safe

BCST Trunnion-mounted Ball Valves are fire-safe by design and meet the requirements of API 6FA, API 607, and ISO 10497.

Blowout-proof Stem

The stem of BCST Trunnion-mounted Ball Valves has an integral shoulder that butts against a matching profile in the body to make it blowout-proof. This feature also enables the online replacement of packing rings during an emergency.

Anti-static

The build-up of static electricity due to friction between the ball and soft seat material is a fire hazard. A spring-loaded plunger is provided on the stem to ensure electrical continuity and to dissipate any static electricity generated.

Cavity Relief

To prevent damage to valve seats and ball due to over-pressurization inside the cavity, all BCST Trunnion-mounted Ball Valves are provided with an automatic cavity pressure relief mechanism. When the pressure of entrapped fluid exceeds 1.33 times the rated pressure, the spring-loaded seat gets pushed away from the ball to relieve pressure.

Internal Trunnion Holder

BCST Trunnion-mounted Ball Valves are equipped with internal trunnion holders (bearing blocks). This design eliminates a leakage path as well as prevents accidental damage during handling.

 

 

Ball Valve 2          Ball Valve 1

Materials of Construction of Trunnion-mounted Pneumatic Ball Valve

 

No.

 

Components

Materials
WCB/ WCC LCB/ LCC
 

1

 

Body

 

A105N/ A216 Gr. WCB/ WCC

A350 Gr. LF2/ A352 Gr. LCB/ LCC
 

2

 

Connector

 

A105N/ A216 Gr. WCB/ WCC

A350 Gr. LF2/ A352 Gr. LCB/ LCC
3 Ball A182 Gr. F6a/ A105N + ENP Coated/ A182 Gr. F316/ F316L A182 Gr. F316/ F316L/ A351 Gr. CF8M/ CF3M
4 Seat PTFE/ RPTFE/ Nylon impregnated with MoS2/ PEEK/ Devlon®/ PCTFE
5 Seat Ring A182 Gr. F6a/ A182 Gr. F316/ F316L A182 Gr. F316/ F316L
6 Coil Spring Inconel X750
7 Bearing SS-backed PTFE
8 Seals FKM (Viton®)/ HNBR/ Nitrile Rubber/ FFKM (Kalrez®) / Lipseals/ Graphite
9 Stem A479 Type 410/ A479 Type 316/ 316L A479 Type 316/ 316L
10 Packing Graphite
 

11

 

Body Seal

 

Graphite/ Spirally-wound SS304/ 316 with Graphite Filler

12 Stud A193 Gr. B7/ B7M A320 Gr. L7/ L7M
13 Hexagonal Nut A194 Gr. 2H/ 2HM/ 7 A194 Gr. 7/ 7M
14 Gear Unit Worm Gear

Pressure – Temperature Range for Seat & Seal Materials of Trunnion-mounted Pneumatic Ball Valve

Seal Range (oC)
HNBR -50 to 165
FKM (Viton®) -46 to 205
FFKM (Kalrez®) -20 to 315
Lip Seal -196 to 150

 

PTFE & RPTFE seats are offered only up to class 300 & up to a maximum temperature of 160°C for class 300.

 

Double Piston Seat of Trunnion-mounted Pneumatic Ball Valve

Elastomer seals with Anti-Explosive Decompression (AED) property is offered for Class 600 and above, and on customer demand

 

BCST Trunnion-mounted Ball Valves are also offered with Double Piston seats. In this design, cavity pressure acts on both upstream and downstream seats to create a ‘double piston’ effect on seat rings that

enhances sealing. Valves with Double Piston seats require an external cavity relief mechanism while handling non-compressible fluids.

 

 

 

 

Additional information

Size

(Hard1~16”)(Soft 1~10”)
(Hard DN25~400) (Soft DN25~250)

Pressure Rating

ANSI150 to 400LB (PN16 to PN64)

Temperature Range

-29~425℃

Leakage Level

ANSI V~Ⅵ

Flow Characteristic

Fast Open

Body Material

A105/ F304/F316

Trim Material

304/316/ +PTFE; 304/316/+Trim is overlaying welding Stellite and Nickel based spraying

Actuator

1. Rotary Pneumatic cylinder piston Actuator
2. Electric Actuator(Or as cilent's requirement)

Share on linkedin
Share on facebook
Share on twitter
Share on pinterest
Share on whatsapp
Share on print
small_c_popup.png

Let's have a chat

Learn how we helped 100 top brands gain success.

BCST Logo
Let's Have A Chat

Learn How We Helped 100 Top Brands Gain Success

BCST Logo