BIG SIZE TRUNNION BALL VALVE

Product description

Cast steel trunnion mounted ball valve is designed in accordance with API 6D featuring 3 PC split body, side entry or top entry design.Cast steel trunnion mounted ball valve is wide range of sealing material including PTFE, PEEK, DEVLON, NYLON, etc, Carbon steel Trunnion mounted ball valve can be used in working temperature range -46ºC~ 500ºC.Cast steel trunnion mounted ball valve is optional designed with Double block and bleed or double piston type. Cast steel trunnion mounted ball valve is equipped with sealant injection system for both stem and seats to allow external intervention to prevent seat or stem leakage. The valves made of different materials are suitable for various media such as water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, oxidizer, urea and etc.

Technical Specification

» Nominal diameter: NPS 2～NPS 56

» Operating temperature: -46℃～121℃

» Operating pressure: CLASS 150～CLASS 2500

» Material: WCB、A105、LCB、LF2、CF8、F304、CF8M、F316, etc.

» Design standard: API 6D、ISO 17292

» Structural length: ASME B16.10

» Connecting end: ASME B16.5、ASME B16.25

» Test standard: API 598、API 6D

» Operation method: Handle, worm, motor-drive unit, pneumatic drive unit

» Application fields: Water, petroleum and natural gas

» Remarks 1: A locking device is provided to prevent misoperation of valve.

» Remarks 2: Valve stem flyout prevention structure design, to prevent accident due to flyout of valve stem caused by abnormal pressurization in the chamber

» Remarks 3: Fireproof and antistatic design

» Remarks 4: The valve stem and the valve seat are equipped with an injection system.

» Remarks 5: DBB (double block and bleed) function

» Remarks 6: Full bore of valve convenient for pigging, of small flow resistance and high flow capacity

Structural Features

1. Double Block And Bleed(DBB)

2. Low Operating Torque

3. Emergency Sealing Device

4. Fireproof Structure Design

5. Anti-static Structure

6. Reliable seat sealing structure

7. Single Sealing (automatic Pressure Relief In Middle Cavity Of Valve)

8. Double Sealing (double Piston)

9. Safety Relief Device

10. Secial Structure Of Automatic Pressure Relief Towards Upper Stream

11. Blow-out Proof Stem

12. Corrosion Resistance And Sulfide Stress Resistance

13. Extension Stem