Ball Valve

The trunnion ball valve is a form of quarter-turn valve which uses a hollow, perforated and fixed/supported ball to control flow through it. A trunnion mounted valve means that the ball is constrained by bearings and is only allowed to rotate, the majority of the hydraulic load is supported by the System constraints, resulting in low bearing pressure and no shaft fatigue. The line pressure drives the upstream seat against the stationary ball so that the line pressure forces the upstream seat onto the ball causing it to seal. The mechanical anchoring of the ball absorbs the thrust from the line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure operating torque remains low. This is particularly advantageous when the ball valve is actuated because it reduces the size of the actuator and hence the overall costs of the valve actuation package. Advantages of trunnion ball design is the lower operating torque, ease of operation, minimized seat wear (Stem/ball isolation prevents side loading and wear of downstream seats improving performance and service life), superior sealing performance at both high and low pressure (a separate spring mechanism and upstream line pressure is used as the sealing against the stationary ball for low pressure and high pressure applications). The trunnion is available for all sizes and for all pressure classes but they are not suitable for throttling purposes.

FEATURES

• 2-3 Piece Body

• Full and Reduced Bore

• Trunnion Mounted

• Double Block and Bleed

• Anti-Blow Out Stem

• Anti-Static Device

• Fire safe to API-607/6FA

• Spring Loaded Seats

• Sealant Injection upon request

• NACE MR-01-75

• Pressure Class: ASME 150 – 2500 API 2000 – 15000

• API Standards: 6D & 6A

• ASME B16.34

Forged Trunnion Mounted Ball valves welded body has spherical body welded by forging materials, with only one welding seam but without bolts and nuts to avoid leakage from body, available for full range of materials in carbon, alloy and stainless steel from general to severe in application, including subsea.

FEATURES

• 1 Piece Body

• Full and Reduced Bore

• Trunnion Mounted

• Double Block and Bleed

• Anti-Blow Out Stem

• Anti-Static Device

• Fire safe to API-607/6FA

• Spring Loaded Seats

• Sealant Injection

• NACE MR-01-7

• Pressure Class: ASME 150 – 1500

• API Standards: 6D

• API 6D SS

• ASME B16.34

SPECIFICATIONS

Size Range: 2” – 56”

Pressure Class: ASME 150 – 2500 API 5000-15000

API Standards: 6D & 6A

ASME B16.34

FEATURES

• 1 Piece Body

• Full and Reduced Bore

• Trunnion Mounted

• Double Block and Bleed

• Anti-Blow Out Stem

• Anti-Static Device

• Fire safe to API-607/6FA

• Spring Loaded Seats

• Sealant Injection upon request

• NACE MR-01-75

• Pressure Class: ASME 150 – 2500 API 5000-15000

• API Standards: 6D & 6A

• ASME B16.34

Following are the dimensions of the butt welding pipe ends according to ANSI B16.25.

Block & Bleed valves with two balls in one body to achieve a positive sealing in a compact design.

True Meaning of Double Block and Bleed

API 6D defines a double-block-and-bleed valve (DBB) as a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces.”

FEATURES

• 1-3 Piece Body

• Full and Reduced Bore

• Trunnion Mounted

• Double Block and Bleed

• Anti-Blow Out Stem

• Anti-Static Device

• Firesafe to API-607/6FA

• Spring Loaded Seats Sealant

• Injection on Request NACE

• MR-01-75

• Pressure Class: ASME 150 – 2500

• API Standard API 6D

• ASME B16.34

Trunnion mounted ball valves are designed for high pressure applications. Our valves are designed in accordance with industry standards - API 6D, API 598 and ASME B16.34. commonly used for gas or crude oil pipelines. Larger size and higher pressure class appropriate

FEATURES

• 2 Piece Body

• Full and Reduced Bore

• Trunnion Mounted

• Double Block and Bleed

• Anti-Blow Out Stem

• Anti-Static Device

• Fire safe to API-607/6FA

• Spring Loaded Seats

• Sealant Injection

• NACE MR-01-75

• Pressure Class: ASME 150 – 600

• API Standards: 6D

• ASME B16.34

Three-way ball valve has an L- or T-shaped hole through the valve, to create multi-directional medium switch.

Moreover, multi-port ball valves such as 4 ways or more, are also available, the inlet way often being orthogonal to the plane of the outlets. For special applications, the operation is performed by rotating a single lever 4-way ball valve. The 4-way valve has two L-shaped ports in the ball that do not interconnect, sometimes referred to as an "×" port.

Features of Three Way Ball Valves:

4-piece Body, Floating Ball type

L-shaped or T-shaped Ball for Various Diversion

Full Port or Reduced Port

Fire Safe to API 607

Antistatic Design

Anti-blowout Stem

Lever, Gear Operation or Actuator Available

Applicable Standards of Three Way Ball Valves:

a) Design & Manufacture: API 6D, BS 5351, ASME B16.34

b) Face to Face: ASME B16.10, EN 558, API 6D

c) End Connection: ASME B16.5, EN 1092, JIS B2220

d) Test and Inspection: API 6D, EN 12266, API 598

Sizes: 1/2" - 10" ,DN 15 - DN 250

Pressure Rating: Class150 - Class 600 or PN 16 - PN 100

Material of valve body: WCB, LCB, CF3, CF8M, CF3M, A105, LF2, F304, F304L, F316, F316L etc.

Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator

Floating Ball Valves typical application is for smaller sizes (up to 6 inches) and lower pressure classes. They are characterized by simple design, easy maintenance, low cost and quick delivery. Body construction can be two or three pieces, bolted or screwed body, made by forging, forged or rolled bar. Wide range of materials: carbon steels, austenitic or martensitic SS, duplex-super duplex SS, nickel-based alloys, titanium, aluminum-bronze and other exotic materials. Valve main technical features include automatically self-relieving body cavity (due to floating ball) and anti-blow-out stem.

Floating ball design supports the ball with two PTFE seats, one on the upstream and the other on the downstream side of the ball. The upstream pressure pushes the ball which compresses the downstream side seat to completely shut off fluid control. We are highly recommending this product. It is reliable high quality castings and fire safe design certified according to BS 6755, API607 & API 6FA. Meet all applicable ASME standards.

Design: Fire-safe to API 607, 6FA

Body Material: WCB, LCB, LCC, CF8, CF8M

Class: 150 ~ 300

Size: 1/2” ~ 24”

Two-piece & Three-piece Body

Cryogenic service as applicable

Floating Ball Valves typical application is for smaller sizes (up to 6 inches) and lower pressure classes. They are characterized by simple design, easy maintenance, low cost and quick delivery. Body construction can be two or three pieces, bolted or screwed body, made by forging, forged or rolled bar. Wide range of materials: carbon steels, austenitic or martensitic SS, duplex-super duplex SS, nickel-based alloys, titanium, aluminum-bronze and other exotic materials. Valve main technical features include automatically self-relieving body cavity (due to floating ball) and anti-blow-out stem.

Ball valves are basically available in three versions: full port, venturi port and reduced port. The full-port valve has an internal diameter equal to the inner diameter of the pipe. Venturi and reduced-port versions generally are one pipe size smaller than the line size, the valve ends are available as butt welding, socket welding, flanged, threaded and others.

Ball valves applications

The following are some typical applications of Ball valves:

• Air, gaseous, and liquid applications

• Drains and vents in liquid, gaseous, and other fluid services

• Steam service

ADVANTAGES:

• Quick quarter turn on-off operation

• Tight sealing with low torque

• Smaller in size than most other valves

DIAADVANTAGES:

• Conventional Ball valves have poor throttling properties

• In slurry or other applications, the suspended particles can settle and become trapped in body cavities causing wear, leakage, or valve failure.

Trunnion Side Entry Ball Valves typical application is for gas or crude oil pipelines, larger sizes (up to 60 inches) and higher pressure classes (ASME 4500 or API 15000psi). Body construction can be two or three pieces for smaller sizes (up to 6” RB), three pieces for larges dimensions. Raw material can be either forgings or centrifugal castings. Wide range of materials: carbon steels, austenitic or martensitic SS, duplex-superduplex SS, nickel-based alloys. Bolted body as a standard, welded body for special applications (see specific section).

Valve main technical features include anti blow-out stem and valve seats design available in three different versions:

SPE (Single Piston Effect): the seat is energized by upstream pressure only.

DPE (Double Piston Effect): the seat can be energized by upstream pressure or by body cavity pressure.

DUAL (SPE upstream and DPE downstream): combining the two seat designs explained above, a double barrier can be assured in case of seat sealing failure.

The trunnion ball valve is a form of quarter-turn valve which uses a hollow, perforated and fixed/supported ball to control flow through it. A trunnion mounted valve means that the ball is constrained by bearings and is only allowed to rotate, the majority of the hydraulic load is supported by the System constraints, resulting in low bearing pressure and no shaft fatigue. The line pressure drives the upstream seat against the stationary ball so that the line pressure forces the upstream seat onto the ball causing it to seal. The mechanical anchoring of the ball absorbs the thrust from the line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure operating torque remains low. This is particularly advantageous when the ball valve is actuated because it reduces the size of the actuator and hence the overall costs of the valve actuation package. Advantages of trunnion ball design is the lower operating torque, ease of operation, minimized seat wear (Stem/ball isolation prevents side loading and wear of downstream seats improving performance and service life), superior sealing performance at both high and low pressure (a separate spring mechanism and upstream line pressure is used as the sealing against the stationary ball for low pressure and high pressure applications). The trunnion is available for all sizes and for all pressure classes but they are not suitable for throttling purposes.

Trunnion Welded Body Ball Valves typical application is for gas transmission, buried pipelines (underground), larger sizes (up to 60 inches) and medium pressure classes (up to ASME 900 psi). Raw material can be either forgings or centrifugal castings. Wide range of materials: carbon steels, austenitic or martensitic SS.

Valve main technical features include anti blow-out stem and valve seats design available in three different versions:

SPE (Single Piston Effect): the seat is energized by upstream pressure only.

DPE (Double Piston Effect): the seat can be energized by upstream pressure or by body cavity pressure.

DUAL (SPE upstream and DPE downstream): combining the two seat designs explained above, a double barrier can be assured in case of seat sealing failure.