Cast Trunnion Ball Valve

 

Design of Top Connection for Actuator:

● Bare shaft with ISO 5211 top flange: Yoke can round or square according to client request

● Bore Options: Choose from full-bore or reduced-bore configurations to suit your application needs.

● Extended Stem and Stem Cover: The stem extension is customizable to accommodate different installation requirements or for use in cryogenic services.

● Available Actuators: Options include a hand lever, gearbox, pneumatic actuator with a manual override, and an electrical actuator with SIL certification.

 

Technical data
Design	API 6D, API 608, MSS-SP-72(BS5351),ASME B16.34
Pressures range	ANSI 150 ~ANSI 2500 ,PN10~PN420
Size range	2"-48" / DN50-DN1200
Body Material	A216 WCB	A352 LCB	A217 WC1	A217 WC6	A217 WC9	A217 C5	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
	NACE MR-01-75/NACE MR-01-03 Special Requirements
Face to face	API 6D, ASME B 16.10,
Fanged RF, FF, RTJ Ends	ASME B16.5, ASME B16.47 (Size 26''~60'')
	BS 4504,
Butt-Weld BW Ends	ASME B16.25 ,DIN 3239,
Temperature range	-196°~ 650°C
Design feature
Construction	Two or Three piece body and Welded body
Port	Full bore and Reduced bore
Ball Type	Solid ball
Stem	Blowout-proof stem, Anti-static,
Seat Sealing	Double Block and Bleed, Double Isolation and Bleed
Valve Operation	Gear,pneumatic,Hydraulic,Electric actuators.
	Locking devices,extended stem,etc
Fire Safe	API 607, API 6FA
Other design	Anti-static design, automatic pressure relief design, emergency grease injection design, drain valve, anti-corrosion design, anti-sulfur design,etc
Inspection and Test
Visual Inspection	MSS SP-55
Material Inspection	PMI Test----Chemical Analysis
	HB Test---Hardness Test
	UT---Ultrasonic Test
	RT---Radio-graphic Test
	MT---Magnetic Test
	NDT Test Non-destructive
Dimension inspection	According to drawings
Valve Inspection and Test	API 598, API 6D, DIN 3230, EN12266

 

Cavity Pressure Relief Seat

Single Piston Effective (SPE) Design

Pd= Medium Pressure Pc= Body Cavity Pressure Ps= Spring Force

In the SPE design, the medium pressure (Pd) and spring force (Ps) work together to push the valve seat against the ball, ensuring tight sealing. When the body cavity pressure (Pc) rises above the combined force of the medium pressure and spring force, the cavity pressure will force the seat away from the ball, allowing automatic pressure release. This unique valve seat design enables the ball valve to perform block and bleed functions on both sides, known as Double Block and Bleed (DBB) functionality.

 

Double Piston Effective (DPE) Design

The DPE design operates similarly, with the medium pressure (Pd) and spring force (Ps) pushing the valve seat against the ball for secure sealing. However, when the body cavity pressure reaches its limitation, the excess pressure is released through a body vent bleeder (Safety Valve), ensuring that the valve cavity pressure remains below the combined force of Pd and Ps. This valve seat design guarantees that the ball valve achieves double isolation and block (DIB) functionality, isolating and blocking both sides of the valve.

 

Body Structure: Available in 2-piece or 3-piece configurations
Sealing Mechanism: High shut-off capability with low torque operation
Functionality: Block and bleed function incorporated
Pressure Relief: Self-cavity pressure relief system
Safety: Fire-safe design to ensure operational integrity in emergency situations
Stem Construction: Blow-out proof stem for enhanced durability and safety
Anti-Static Measures: Anti-static design to prevent electrostatic discharge
Locking Device: Optional locking device for lever handle operation for added security
Actuator Mounting: ISO 5211 compliant actuator mounting interface
Optional Feature: Emergency grease injection capability (optional)

 

 

 

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