Wafer Type Butterfly Valve

ZECO Valve is engaged in manufacturing and supplying a wide range of Wafer Type Butterfly Valves.

What is a Wafer Type Butterfly Valve?

Wafer Type Butterfly valve construction is formed with the centered disc rotating inside the valve body 90 degrees. With the actuation type, the flow of the fluid can be stopped, regulated or started. In a wafer connection, the valve is installed between the pipe flanges and tightened to its place with the bolts for the pipe flanges.

Technical Standard of Wafer Type Butterfly Valves

General Design and Manufacturer BS 5155 / API 609 / EN 593 / IS 13095
Valve Face to Face Dimension BS 5155 / ISO 5752 / API 609
Top Flange Drilling ISO 5211
Valve Inspection and Testing BS 6755 Part – I / API 598 / EN 12266-1
Flange Standard Conformity ANSI 150 / ANSI 125 / BS 10 TAB D & E
Size Range DN 40 TO DN 1600
Pressure Rating PN 10 (DN 650 TO DN 1200) / PN 10 & PN 16 & PN25 (DN 40 TO DN 600)
Operating Temperature Range -25°C to 200°C (Depending on MOC)
Operation Hand Leaver/ Worm Gear Operation- Optional
Electrical / Pneumatic actuator operation – Optional

Seat Temperature Range of Wafer Type Butterfly Valves

SEAT TYPE TEMPERATURE RANGE
Min. Max.
NITRILE -13°F (-25°C) 212°F (100°C)
EPDM -13°F (-25°C) 250°F (120°C)
SILICON -58°F (-50°C) 356°F (180°C)
VITON -23°F (-5°C) 392°F (200°C)
HYPALON -23°F (-5°C) 392°F (200°C)

Advantages of Wafer Type Butterfly Valves

  • Wafer, Lug or U type flanged body style fit between FF or RF flanges
  • PTFE bushing ensure the maximum shaft support and centralized alignment
  • 360° polished disc assures positive on-off
  • Hard-Backed Cartridge Seat
  • One piece shaft, pinned, splined and square connected disc
  • Universal ISO 5211 mounting Pad

Wafer Type Butterfly Valve Installation

The valves are bi-directional and can be fitted in either direction relative to the ow. The valve will control flow equally in either direction. The recommended installation position is shaft horizontal and the lower disc edge opening downstream (especially for slurry service and media with a tendency for sedimentation). For optimum valve control and smooth performance, it should have 10 to 20 pipe diameters of straight run inlet piping and 3 to 5 pipe diameters straight outlet piping.

Do not use the valve as a crow-bar to spread the flanges, this might lead to damage to the flange area and/or damage to the O-ring sealing.