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A Butterfly Valve

Delivery term:The date of payment from buyers deliver within days
  • Price:

    Negotiable

  • minimum:

  • Total supply:

  • Delivery term:

    The date of payment from buyers deliver within days

  • seat:

    Liaoning

  • Validity to:

    Long-term effective

  • Last update:

    2020-03-26 15:57

  • Browse the number:

    170

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Company Profile
Ying Desi Rui Machinery Manufacturing Co., Ltd.
By certification [File Integrity]
Contact:

sirui(Mr.)  

Email:

Telephone:

Phone:

Area:

Liaoning

Address:

193 Shenliao West Road, Shenyang Economic and Technological Development Zone, Liaoning Province

Website: http://www.syydsr.com/ http://sirui.china-aote.com/
Product details

A wafer butterfly valve's function is to retain a seal to protect against dual-directional pressure differential in the flow of fluid. In other words, the wafer version of butterfly valves was designed to hold a tight seal, safeguarding against bi-directional pressure differential in order to avoid any backflow in systems that have been manufactured for un-directional flow. This is accomplished by using a tightly fitted seal, such as an O-ring, gasket, precision machined, along with a flat valve face on the downstream and upstream sections of the valve.


Butterfly Valve components:

The butterfly valve consists of only four main components: body, disk, stem, and seat.

Butterfly valve body: Butterfly valves generally have bodies that fit between two pipe flanges, the most common being lug and wafer body design.

Butterfly valve disk: The disk is how the valve stops flow – it is equivalent to a plugin a plug valve, a gate in a gate valve or a ball in a ball valve. There are variations in disk design and orientation in order to improve flow, sealing and/or operating torque.

Butterfly valve Stem: The stem of the butterfly valve may be a one-piece shaft or a two-piece (split-stem) design. The stem in most resilient seated designs is protected from the media, thus allowing an efficient selection of material with respect to cost and mechanical properties.

Butterfly valve Seat: The seat of a resilient-seat butterfly valve utilizes an interference fit between the disk edge and the seat to provide shutoff. The material of the seat can be made from many different elastomers or polymers. The seat may be bonded to the body or it may be pressed or locked in.


Valve components Material specification

Components

Material

Body

Cast Iron, Cast Steel, Brass, Bronze, etc.

Disc

Cast Iron, Cast Steel, SS, Duplex SS, Brass, Bronze, etc.

Stem

SS, Duplex SS, Monel, Inconel, etc.

Seat

EPDM, NBR, NR, VITON, PTFE, etc.

Actuator

Level, Handwheel, Gearbox, Electrical/Pneumatic Actuator, etc.


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