Bare Shaft Fully Welded Trunnion Ball Valve (Q41)

Product Description
Vatac Fully Welded Trunnion Ball Valves are with below Features:

Manufacture in Forged and Casting Materials
WCB, A105, SS304, SS316 & Duplex etc. Other Materials available upon Request, available in Various Trim and Seat (Resilient and Metal) Materials To Suit Different Service Conditions. Pressure Rating Avaible From Ball Valve: CL150, CL300, CL600, CL900, CL1500, CL2500

Flanged (RB, F. P) Ends to ANSI B16.5

Face to Face Dimension to ANSI B16.10

Pre-temp. Rating of Ball Valve to ASME B16.34

Wall Thickness to ASME B16.34

Size Ranges of Ball Valve: 1/2 ~18"

Optional Lockable Handle Lever

Blow-Out Proof Stem

Fire Safe of Ball Valve Design to API 6FA

Inspect & Test: API 6D / API598

Valve Marking of Ball Valve: MSS- SP-25

To MR-01-75 On Request

design

1. Anti-fire safe design
When the trunnion ball valve be used normally, it's sealed by seat and ball surface, seat retainer sealed by O-ring and body, this is soft sealed and reliable sealing. When the seat and O-ring are burnt, the seat retainer and body will be sealed by expanded graphite. Thus act anti-fire safe purpose.

2. Anti-static device
In order to prevent friction among ball, stem and PTFE that generates static electricity which may light the combustibles and explosives that cause an accident, in this ball valve, static-conduction spring is set between the stem and the ball, the stem and the body. Thus static electricity is conducted to ground and system safety is secured.

3. Free leakage of body Sealed construction
The connective position of valve body and bonnet is double sealed by gasket and O-ring, on this base, such factors as fire, high temperature, shock and uneven opening or closing of the torque all can't induce external leakage.

4. Low torque in operation
The self-lubricated bearings are installed at the friction of stem, resulting in wear resistance, flexibility of operation and low torque.

5. Double block & bleed (DBB)
When ball is full open or close position, the transmitter substance in center cavity of body can be released by drainage and emptying devices. In addition, the over loaded pressure in the center cavity of valve can be released to low pressure end by self relief seat.

6. Emergency sealing
Compound injection holes are designed and compound injection valves are installed at locations of stem/cap and body support of side valve. When sealing of stem or seat is damaged to induce leakage, the compound can be used to do the second time sealing. A concealed check valve is installed in side of each compound injection valve to prevent compound from out flowing due to the action of transmitter substance. The top of the compound injection valve is the connector for fast connection with compound injection gun.