A floating ball valve is a valve with its ball floating (not fixed by a trunnion) inside the valve body; it drifts toward to the downstream side and tightly pushes agains the seat under the medium pressure to ensure a reliable seal.
The floating ball valve is a simple design with goog sealingperformance relying on the seat material to withstand the workload as the sealing pressure is barred by the seat ring. Floating ball valves are mainly used in low to mid level pressure applications.
Cast Steel Floating Ball Valve
Technical Specification
Design and Manufacture : API 608, ISO 17292
Face to Face/ End to End : ASME B16.10
Flange End : ASME B16.5
Test & Inspection : API 598
Main Materials
WCB, LCB, CF8 (M), CF3 (M),
A995 4A, A995 5A, A995 6A,
Alloy 20, Monel, Inconel
Main Parts Material Sheet
Note : (1) The lenght of the bonnet extension of cryogenic valves shall be determined base on actual working temperature
Dimensions and Weights
Class 150
Class 300
Class 600
Floating Ball Valve Torque Table
Note :
The torque measuring and calculation is based on normal room temperature, when selected seat material is PTFE/ RPTFE for Class 150/ Class 300 and Nylon for Class 600.
For low-temperature/ cryogenic service, the torque will increase 2 fold.
When sizing the actuator, a safety factor of 1.3 - 1.5 times shall be applied.
When the service or seat material is different than that specified above, the torque value will be different, it shall be subject to the conformation from the manufacturer.
Forged Steel Floating Ball Valve
Technical Specification
Design and Manufacture : API 608, ISO 17292
Face to Face/ End to End : ASME B16.10
Flange End : ASME B16.5
Test & Inspection : API 598
Main Materials
A 105, LF2,
F304 (L), F316 (L), F51, F53, F55
Alloy 20, Monel, Inconel
Main Parts Material Sheet
Note : (1) The lenght of the bonnet extension of cryogenic valves shall be determined base on actual working temperature
Dimensions and Weights
Class 150
Class 300
Class 600
Class 800,Class 1500 - Class 2500
Applicable Standards
Design and Manufacture : ISO 17292 (BS 5351)
API 608
ASME B16.34
Connection End
Socket Weld End (SW) : ASME B16.11
Threaded End (NPT) : ASME B1.20.1
Butt-Weld End (BW) : ASME B16.25
Test & Inspection : API 598
Main Materials
A 105, LF2,
F304 (L), F316 (L), F347, F321, F51,
Alloy 20, Monel
Main Parts Material Sheet
Dimensions and Weights
Class 800 - Class 1500
Note : Class 800 - Class 1500
3-Pc, Bolted Bonnet, Full Port, Threaded, Butt-Weld, Socket Weld,
Design ISO 17292 (BS5351), API608, ASME B16.34
Class 2500
Note : Class 2500
3-Pc, Bolted Bonnet, Full Port, Threaded, Butt-Weld, Socket Weld
Design ASME B16.34
