Triple Offset Butterfly Valve-R71800 Series

The R-71800 series Triple Offset Butterfly Valve adopts the design of axial Triple Offset structure and asymmetric sealing surface which ensures zero friction between the dick and seal in 0-90° rotation and eliminates the sealing surface wear and frictional force caused in rotary control valves. This has changed the situation where rotary control valves require grinding to seal achieving a tight seal by compression.
The valve seat features multi-level structure utilizing the sealing surface formed by the combination of mental and special non-mental materials which effectively protect the valve from leakage. With excellent sealing performance long sealing time they are frequently applied in high temperature services. They are suitable for regulating and cutting off almost all gases and liquids in industrial control process.

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Triple Offset Butterfly Valve Parameter Description

Item	Description
Design Type:	Triple Offset, Metal-to-Metal Sealing
Body:	Wafer, Lug, Double Flanged
Bonnet:	Standard, Extended (for high temp / cryogenic optional)
Temperature Range:	-196°C ~ 650°C
Seat Type:	Metal Seat (Stainless Steel / Stellite Overlay)
Sealing Type:	Torque Sealing, Zero Leakage Design
Leakage Class:	Class V (Standard), Class VI (Optional with special design)
Stem Sealing:	Graphite Packing, Optional Bellows Seal
Flow Characteristic:	Bi-directional, Tight Shut-off
Operation Type:	Manual, Gear Operated, Pneumatic, Electric
Connection Type:	Flange, Wafer, Lug, Butt Welding
Application:	Oil & Gas, Petrochemical, Power Plant, LNG, High Temperature Service

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Floating Ball Valve Structure and Materials

beier floating ball valve gyr51300 series

No.	Name	Material
		Carbon steel	Stainless steel	Cr-Mo steel
1	Body	ASTM A216 WCB/WCC	ASTM A351 CF8/CF8M	ASTM A217 WC6/WC9
		ASTM A276 F304/F316/F316L
2	Nut	ASTM A194 2H 8 8M
3	Gasket	ASTM A276 F304/F316/F316L+Flexible graphite/PTFE/R.TFE/PP
4	Double-end stud	ASTM A193 B7 B7M B8 B8M
5	Seat	ASTM A276 410/420 ASTM A276 F304/F316/F316L PTFE/R.TFE/PPL
6	Stem	ASTM S17400 17-4PH ASTM A276 410/420 ASTM A276 F304/F316/F316L
7	Cap nut	ASTM A276 F304/F316/F316L
8	Locknut	ASTM A276 F304/F316/F316L
9	Packing gland	ASTM A216 WCB/WCC	ASTM A351 CF8/CF8M	ASTM A217 WC6/WC9
10	Packing	PTFE/R.TFE/PPL/Sulfur-free flexible graphite
11	Packing gasket	ASTM A276 F304/F316/F316L
12	Body	ASTM A216 WCB/WCC	ASTM A351 CF8/CF8M	ASTM A217 WC6/WC9
		ASTM A276 F304/F316/F316L
13	Trim	ASTM A216 WCB/WCC	ASTM A351 CF8/CF8M	ASTM A217 WC6/WC9

Floating Ball Valve Design Features

1.Soft-seated Ball Valve Design

The non-metallic PTFE seat ensures low friction, reduced operating torque, and outstanding chemical resistance. It is suitable for handling most corrosive media.Upon closing, the ball rotates to a position perpendicular to the pipeline, and the line pressure forces the ball against the downstream seat, providing bubble-tight sealing performance.

2.Fire-Safe Design of Valve Seat

For the R-51300 O-type floating ball valve, under normal operating conditions, the valve seat tightly contacts the ball to ensure reliable sealing performance. In the event of a fire, when the PTFE seat is damaged or destroyed, the medium pressure continues to push the ball forward, enabling direct metal-to-metal contact between the ball and the metal seat, thereby maintaining sealing performance and achieving a fire-safe function.

3.Metal-seated Ball Valve Design Normal temperature

4.Metal-seated Ball Valve Design High Temperature

The metal seat is designed with an elastic sealing ring and hard-faced with Co-Cr alloy for superior wear resistance. It ensures reliable sealing under both low and high pressure conditions by automatically adjusting the contact area between the seat and the ball.An O-ring at the seat periphery provides additional sealing security. This design is particularly suitable for applications involving particle-laden media and moderate temperatures.