Trunnion mounted ball valve

A trunnion mounted ball valve has the ball fixed on trunnions and the seats press against the ball .​ The seats have springs that press them against the ball, the medium assists the springs to seal off on the ball.​
Standard the seats are pressure relieving (SPE), this means the pressure that can build up in the body finds its way past the seat(s). In principal the pressure can go both ways, up and down stream.​
In special circumstances one or both seats can have the double piston effect (DPE), simply stated that type of seat does not allow the seat to move from the ball due to (over)pressure from an unwanted side. Special care is required with regards to safety and installation.​

A trunnion mounted ball valve body can be made of forged or cast material.​ The body can consist of 2 or 3 pieces which can be called: end entry, 2 piece body, split body, 3 piece body.​
Typically available from 2” till very big where the cast version is more limited in size and pressure rating. ​

The available port or bore size is reduced or full. Reduced is normally 1 pipe size smaller (sometimes more) and full is, the same as the pipe size. Check the standards for the actual dimensions.​
Body materials can be almost any, the most common are: forged or cast steel (A216 WCB / WCC, A105, LF2) and Stainless Steel (CF8M, F316). Where lined valves are common with the floating design, in trunnion the valve is high alloy or cladded (strong base material with corrosion resistant layer welded on it)​.
Seat materials typically are: Nylon, Devlon, Teflon (TFE, PTFE, CTFE, etc.), metal (hardened), PEEK, KEL-F (PCTFE).​
If you want to use a ball valve to “control” the flow it can have a cage or drilled pattern in the ball.​ The body parts are typically bolted together but fully welded is possible.


Isolation valve for above ground and buried pipeline installations; long-term gas storage facilities; compressor, gathering, and metering stations; gas terminals; residential gas installations; onshore and offshore production and gas and LNG processing; and subsea isolation


  • Superior stem sealing performance.
  • Compliant with low-emissions environmental standards.
  • Spherical body design that maximizes strength with reduced weight.
  • Low maintenance.
  • Low cost of ownership.
  • Extended service life and sealing reliability.


  • All-welded construction.
  • Sealing options in self relief (T31) or double piston effect (T32), or a combination of both (DIB2).
  • Double block-and-bleed standard in both closed and open positions.
  • Antiblowout stem design.
  • Thermoplastic seals with no aging effect and no susceptibility to explosive decompression.
  • Belleville springs that maintain constant spring force and protect seat-to-body seal.
  • Robust stem stops that withstand actuator torque.
  • Stem stop viewports that enable verification of proper valve position.
  • Seat and stem injection port with internal check valve.
  • Rotating seats that spread wear over the entire sealing surface for longer service life.

Longer service life

The CAMERON T30 Series valve can be equipped with a mechanism that makes both seat rings rotate at the end of the closing operation. Rotating seat rings are self-cleaning, distribute wear, ensure optimal sealing contact, and facilitate the distribution of any injected flush, grease, or sealant.

CAMERON T30 Series valves are available for pressure classes ASME 150 to 2500 (PN 20 to PN 420) as well as API 2000 to 5000 standards.
Made of forged steel to ensure uniform fine grain structure and toughness, they can be specified in sizes from NPS 2 to 56 (DN 50 to 1400).
These valves are also fire tested to API and ISO standards.

Superior stem sealing performance

These valves include an adjustable and replaceable seal in an antiblowout stem design. In addition, a low-emissions environmental standard design is also available.

Fully welded with a forged spherical body .

The distinctive design of the CAMERON T30 Series valve maximizes strength at reduced weight and improves resistance to pipeline pressure and stresses with less wall thickness. The compact, spherical design also eliminates body flanges, reducing overall size and potential leak paths.

Low maintenance without removing pressure from the pipeline.

Designed to eliminate the need for lubrication, the CAMERON T30 Series valve enables maintenance without reducing pressure or removing the valve from the pipeline.

Low cost of ownership

This valve is designed to minimize material for a lower weight, lower costs for installation and transportation, and minimal maintenance, which improves production uptime.

Grove was founded in 1934 in California by Marvin Grove, in 1971 Grove Italy was founded and became the HQ in 1986. A true pioneer in the industry: API 6D license #001, API 6DSS license #003.

Quick (stock) delivery possible for a selection of Grove valves

Grove trunnion mounted bolted body ball valves & welded body ball valves and through conduit slab gate valves.​

Application areas: emergency shutdown, pigging, custody transfer, metering skids, risers, transmission pipelines, production plants, subsea, LNG, onshore, offshore, subsea, etc.​

B4        : API 6D forged bolted side entry 3-piece trunnion
mounted ball valve. (B4.B, B4.C & B4.D)​
Size     : 1” – 4”​
Rating : #150 – #1500 (incl. #400)​

B5       : API 6D forged bolted side entry 3-piece trunnion
mounted ball valve. ​
Size     : 6” – 60”​
Rating : # 150 – #1500 (incl. #400)​

B7       : API 6D forged bolted side entry 3-piece trunnion
mounted ball valve.  (B7.1 & B7.B)​
Size     : 1 ½” – 20”​
Rating : #2500​

B8       : API 6D forged welded side entry “3-piece” trunnion
mounted ball valve (B8, B8.1 & B8A)​
Size     : 2”- 60”​
Rating : #150 – #2500 (incl. #400)​

BT       : API 6D top entry cast trunnion mounted ball valve (BT1
& BT2)​
Size     : 1 ½” – 60”​
Rating : #150 – #2500​

G4N  & G7 : API 6D through conduit double block & bleed (DBB)
slab gate valve.​

International Standard Valve is a manufacturer located in Stafford USA and are approved by ExxonMobil, Chevron, Tengizchevroil, Kinder Morgan, etc. and are API 6D approved.​

ISV floating and trunnion mounted ball valves

API 6D Trunnion mounted ball valve DBB, DIB-1 & DIB-2​
Construction : 3 piece forged welded body (BT3G & BT3GU )​
Size              : 2” – 56”​
Rating           : #150 – #2500​
Construction : 3 piece forged bolted body (BT3G & BT3GU)​
Size              : 2”- 48”​
Rating           : #150 – #2500​
Construction : 2 piece cast bolted body (BT3E & BT3EU)​
Size              : 2” – 12”​
Rating           : #150 – #1500​

API 608 & B16.34 floating ball valve (BF1BU, BF1A, BF1EU, BF2EU, BF2E, BF2D, BF0A, BF0C, BF0E, BFoE-CF)​
Construction: 2-piece bolted
size              : ½” – 10”
Rating          : #150-600
Port              : RB & FB
Material        ​:WCB/LCC/CF8M/CN7M/Hastelloy/Duplex​

Construction: Uni body
size              : 1”- 8”
Rating          : #150
Port              : RB
Material​        : WCB/LCC/CF8M/CN7M/Hastelloy/Duplex​

Construction: 3-piece bolted
size              : ½” – 2”
Rating          : #600-1500
Port              : RB & FB
Material        ​: A105/LF2/F316/F51/Inconel​

Construction: Cryogenic
size : ½”-10”
Rating : #150-600
Port : RB & FB
Material​ : CF8M​

Construction: 3-piece bolted
size : ½”-2”
Rating : #150-1500
Port : RB & FB
Material ​: A105/LF2/F316/F51/Inconel​

Construction: 3-piece bolted
size : ½”-2”
Rating : 1500&2000 WOG
Port : FB
Material​ : WCB/CF8M/CN7M​

Construction: 2-piece seal welded
size : ½”-2”
Rating : 2160&2200 WOG
Port : RB
Material ​: WCB/CF8M​

Construction: Uni body
size : ½”-2”
Rating : 2000 WOG
Port : RB
Material​ : WCB/CF8M​

Construction: 2-piece threaded
size : ¼” – 4”
Rating : 1000 WOG
Port : FB
Material ​: WCB/CF8M​

Construction: 3-piece bolted
size : ¼” – 4”
Rating : 1000 WOG
Port : FB
Material ​: WCB/CF8M/CN7M/Hastelloy/Duplex​

WKM has been one of Cameron’s strongest brands since its Flow Control Division acquired it in 1987. The name is trusted among engineers in the industry field because of its stellar track record that has remained constant for more than a century. Their line of ball, butterfly and gate valves have repeatedly delivered positive results in many oil and gas and process controls applications, no matter where they are installed. One of the things that make WKM great is that even though their line is in no ways the cheapest, over the course of time their easy to repair design and replaceable parts make their operating costs lower than many other traditional valves that are less expensive at the initial time of purchase.

Triple-offset valve (TOV)

Field replaceable metal seat​
Fire safe API 607 ​
Fugitive emission API 641 & ISO 15848-1​
Size                    : 3 – 60”​
Rating                 : #150 – 600​
Material              : CS & SS, other on request​
Pattern               : Lug, Short & Long (ISO 5752/API 609)​
End connection : RF, (BW on request)​

Available with short delivery time​

High performance double offset Dynacentric butterfly valve

Size : 2 ½” – 36”​
Rating : #150 – 600​
End connection : wafer, lug​
Body material : WCC, LCC, CF8M​
Temp range : -46 / 538°C​

M-HT API 6A gate valve with Pow-R-seal double expanding gate

Size : 2 1/16 – 4 1/16​
Rating : 2000 – 5000 psi​
Material : ?​
End connection : RF, RTJ, THR​

Saf-T-seal through conduit slab gate valve

Pressure activated seat sealing​
Inline replaceable seats​
Primary soft sealing, secondary metal sealing​

Series : M, C6, C2B, C2C, C6B​
Size : 2” – 36”​
Rating : #150 – #1500​
End connection : RF, RTJ, BW​
Body material : WCC, LCC​

Saf-T-Gard actuators

MA 12, MA 16, MA 20 series single diaphragm actuators for 2”- 6” valves​
MA1212, MA2012, MA2016, MA2020 series double or tandem diaphragm actuators for 2”- 8” valves​
MP 13 series piston actuator for 2”- 4” valves​

Of course other pneumatic, electric or gas / fluid operated actuators can be mounted as well.​

Pow-R-Seal through conduit double expanding gate valve

Mechanical activated seat sealing​
Inline replaceable seats​
Metal sealing​
Thermal body cavity relief​

Series : M, E1C​
Size : 2” – 24”​
Raing : #300 – 900​
End connection : RF, RTJ, BW​
Body material : WCC, WC6, LCC​

Both the slab and expanding gate valve have the unique SLS (single spring loaded) lip seal stem seal system that allows emergency injectable plastic packing.​

Floating ball valves (C50, 210A, 210L, 310C5, 310F)

Series: 210, 310​
Construction: 2 pc. 2 & 3 pc.​
Size: 1-4” ¼-4”​
Rating: 750 – 2000 psi 3000, 5000 psi​
Connection: THR, grooved THR, SW, RF​
Bore: RB, FB RB, FB​
Body material: DI CS, SS​
Fire safe: API 607 API 607

320F flanged 2-piece floating ball valve

The WKM 320 Series API 608 floating ball valve features a patent-pending seat that enables internal cavity relief while maintaining bidirectional sealing capability.​
In every trim, WKM 320 Series valves include NACE compliance, fugitive-emissions capabilities, and fire-test certification to API Spec 607 7th Ed.​

Size ½”- 8”​
Rating #150 – 600​
Bore RB, FB​
Body material WCC, LCC, CF8M, WCC + ZPEX coating​
Seat material Delrin, PTFE, PEEK​
End connection RF, RTJ​

370 Dynaseal trunnion mounted ball valves

Series: 370D4, 370D5, 370D6​
Design: 2pc API6D, 3pc API6D, 2 pc API608, 6D​
Size: 2-16, 18,20,24, 2-16​
Rating: 150, 150-600, 150-2500​
Bore: RB-FB, FB, RB-FB ​
Connection: RF, RTJ RF, RTJ RF, RTJ​
Body mat: WCC, LCC, CF8M, A105, WCC, LCC, CF8M​
Fire safe: API 607. 6FA, API 6FA, API 607​

Need to let it flow? Call on Wegman!