Floating Ball Valves

Detailed Product Description

FLOATING BALL VALVE

Sealing Construction of Valve Seat

The elastic double-bevel seal ring is specially applied in designing the floating ball valve to reduce friction between ball and seal ring for the reduction of operation physical force. The contact area of the seal ring against the ball is small when the medium pressure is comparably small as well, therefore the relatively higher specific pressure of sealing would be featured for ensuring the positive sealing, while the area would be correspondingly increasing when the pressure is becoming larger. In this situation the seal ring can hold thrust force from the medium without being damaged, while the positive sealing state would certainly be maintained.
For the ball valve applied in low-pressure, ultra-low-pressure or vacuum operating condition, the specially-designed sealing construction of spring-loading valve seat would maintain the long-term reliable service of the valve, because the pressure from the medium applied itself could not ensure the positive sealing of the seat while the pre-tightening force would be unavoidably weakened after long-term performance.
Auto-Decompressing Construction

Anti-Static Device

Fire Safe Design
When non-metal sealing material are decomposed or deteriorated by a plant fire,the upstream line pressure pull the ball into contact with the metal seat lip beneath the soft seat to shut off the line fluid to minimize the internal leakage.Additionally, the fire safe metal seat can prevent the line pressure erosion on soft seat and minimize soft seat creep deformation.

Stem anti-blow-out devices

Technical Data
SizeNPS1~10 DN50~250
Pressure RatingsClass150~1500 PN16~100
Body Materials ASTM: WCB(A105) CF8 304CF3 304LCF8 M316 CF3M 316L
D I N GS-C25(St50-2) 1.4308(1.4301)1.43061.4408(1.4401)1.4435
Design StandardDIN3356API 6DASME B16.34
Face to FaceDIN EN 558ASME B16.10
Flanged EndsDIN EN 1092ASME B16.5
Butt-welding Ends ASME B16.25
Test and InspectionISO5208DIN3230 API 6DAPI598
Fire-safe Design ISO10497API 607API 6FA
Notes: The sizes of serial valve flange and butt-welding dimensions can be designed according to customers requirement.