Metal Seated Butterfly Valve


Metal seated butterfly valve is the newly-developed long-life and energy-saving products.
Metal Seated Butterfly Valve

What is a Metal Seated Butterfly Valve?

A metal seated butterfly valve is a type of valve which can be used for isolating or regulating flow. The closing mechanism is the disc, which sits in the center of the valve body. The disc is connected to a handle or actuator via the shaft, which passes from the disc through the top of the valve body. Unlike a ball valve, the disc of the butterfly valve is always present in the flow, which will induce a pressure drop.

How does a Metal Seat Butterfly Valve work?

A metal seated butterfly valve operates in a quarter turn style, meaning that rotating the closed disc 90° will fully open the valve, and vice versa. They can also be opened incrementally in order to throttle flow. This can be accomplished manually, but throttling flow is more precise when used in conjunction with an actuator. Actuators can be customized to allow incremental flow, by using positioners in the case of pneumatic and hydraulic actuators, or by using modulating boards in the case of electric actuators.

Features of Metal Seated Butterfly Valves

  • ZECO metal seated butterfly valve can realize bi-directional sealing, the concept of bi-directional sealing is that no internal leakage can be guaranteed in the valve body no matter from the forward pressure of the valve body or the reverse pressure of the valve body, and can meet the zero leakage requirement of API 598 international standard;
  • ZECO metal seated butterfly valve adopts double security architecture design, disc, stem and sealing surface directly under medium pressure in the pipeline and the wear and tear, ZECO to prevent possible pipeline due to various problems caused by the butterfly plate deformation, dislocation of stem, the phenomenon such as sealing face fit, the butterfly disc up and downside is equipped with two separate independent thrust ring ensure the normal operation;
  •  ZECO metal seated butterfly valve is designed with a replaceable sealing ring. The sealing surface of butterfly disc and butterfly disc are independent of each other, and the valve seat and valve body are independent of each other, so butterfly plate sealing ring and valve seat can be replaced at the same time. When the sealing ring or seat is damaged, only the sealing ring and seat need to be replaced;
  • The valve seat of ZECO butterfly valve adopts the structure of forged valve seat made of all-metal alloy steel. Its hardness is extremely high, it can be used in abrasion media, and it is resistant to high temperature and high pressure.
  • ZECO metal seated butterfly valve offers a light weight, lower cost, heavy duty, and maintenance free solution to high pressure applications.

Applications of Metal Seat Butterfly Valves

Metal Seated Butterfly Valve is widely used in petroleum, natural gas, piped gas and medicine, food industry, industrial environmental water treatment and shipping industry.

Material of Metal Seated Butterfly Valves

No Part Material
1 Body ASTM A351 CF8
2 Seal Ring Graphite + SS304
3 Retainer Flange ASTM A182 F304
4 Pin ASTM A276 304
5 Disc ASTM A351 CF8
6 Stem ASTM A276 304
7 Stem Packing Graphite
8 Stem Beating SS304 + PTFE
9 Bolt ASTM A193 B8
10 Nut ASTM A194 8
11 Yoke ASTM A216 WCB

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