TOBO STEEL GROUP CHINA
Connection AISI 316 PN 10-16, DN100 150LB Wafer butterfly valves
Article: 1400-1401
Suitable for flanges UNI EN 1092-2 PN 10, PN 16 and ANSI #150
Face to face length: EN 558-1 serie 20, DIN 3202 K1 Design EN 593
Installation: horizontal / vertical
APPLICATIONS • Water supply • Waste water treatment plants • Fire fighting systems • Power plants • Industry • Drinking water • Irrigation • Heating – conditioning systems • * available disc in stainless steel (fig 1401) for salty water
- Fig. 1400: disc in GGG
- Fig: 1401: disc in stainless steel AISI 316
Epoxy paiting suitable for drinking water applications.
The wafer butterfly valves are widely applied, thanks to there multiple functions of regulation and on-off valves. Thanks to the EPDM gasket and to the epoxy coating, the wafer butterfly valves can be installed in drinking water plants, but they can also be applied for sewage or brackish water with inox disc (fig.1401) and body not in touch with the fluid. The wafer butterfly valves are manufactured as centric type disc, they can stand both directions of fluid and are maintenance-free. With EPDM sleeve, they can stand maximum 130°C temperature. The wafer butterfly valves can be installed between welding neck flanges EN PN 10-16 and ANSI #150, without any need of additional flange gaskets. Such valves can be installed in any position. The wafer butterfly valves come with lever (standard execution); reducing gear, pneumatic operator with single or double effect, electric actuator on request.
A Butterfly valve is a quarter-turn rotary motion valve, that is used to stop, regulate, and start the flow. Butterfly valves are a quick open type. A 90° rotation of the handle can completely close or open the valve. Normally, they are used in systems where a positive shut-off is not required. In this article, you will learn about following types of Valve.
Large Butterfly valves are usually equipped with gearbox type actuator, where the handwheel is connected to the stem via a gearbox. This will reduce the force but at the same time reduce the speed of the operation. This type of valve should be installed in the open position. If the valve is closed during installation, the rubber seat will wedge against the valve disc and make it difficult to open.
Materials
Dimensions
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Types of Butterfly Valves Based on Body Construction
Based on the type of ends of the body butterfly valves are available in following types.
Both Flanged Ends
Wafer Type Ends
Lug Type Ends
Butt Welded Types Ends
Water Type
The wafer body is placed between pipe flanges, and the flange bolts surround the valve body. A wafer type butterfly valve is easy to installed but it cannot be used as an isolation valve.
Seat Types
Butterfly valves can be metal-to-metal seated, soft seated, or with a fully lined body and disc. The first image is of a soft seated fully lined body and disc valve. Second, is a soft seat with metal disk and the third is metal to metal seat type valve.
Contact Person: Ms. TOBO
Tel: 021-31262012
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