6 inch Wafer Type Butterfly Valve


Butterflly valve 6 inch means the valve size is 6 inch, and in DN it is DN150.

What is a 6 Inch Wafer Type Butterfly Valve?

6 inch butterfly valve for on-off control of air, oil and other media compatible with the materials of construction. Wafer style valve sandwich mounts between customer supplied ANSI /ASME Class 150 and other international standard flanges.

Dimensions & Weight of 6 Butterfly Valve

Pressure Rating  Face to Face Dimension(in mm) Weight
RF Long Pattern RF Short Pattern Wafer Type Lug Type kg
CLASS 150 267 140 57 57 65
CLASS 300 403 210 59 59 90
CLASS 600 559 210 78 78 170

Installation of Butterfly Valve 6 inch

ZECO provides detailed installation instructions to ensure high performance and long service life of the 6 inch butterfly valve. The capacity if piping flanges and valve depends the deformation of gaskets. Acting force of bolting is not only resists force to loosen the connection, but also to keep necessary compressing stress. Taking note of the force does not exceed the gasket load and pressure load.

In order to ensure good connection, following instructions shall be noted.

  • Check flange surface, if any defect appears leakage, groove or impress, repair before installation;
  • The installation requests of Cast iron flange are more than the ductile cast iron. Proposed to use low-strength steel Bolted to reduce as a result of excessive pre-compression flange of the possibility of exceeding the prescribed stress. To fit flat flange gasket in the flat flange to prevent excessive torque of bolt flange damage. Should not be confused with convex planar flange of the loaded flange In the cast iron flange connection is particularly important that the top is installed on the better to ensure that in the absence of excessive load bolted gasket circumstances make an appropriate compaction force;
  • Gasket have the capacity of resisting deformation and damage;
  • Check the centration of assemble-part flanges, Lubricate the threads of boltings. Boltings shall be fasten sequential to make sure level contact between flange and gasket.

Features of 6 Butterfly Valve:

  • Unique wave line seat and disc shape, reduces the required torque and extends the life of the valve.
  • The disc seat is vulcanized to a phenolic back-up ring guaranteeing positive control of seating torque while eliminating seat distortion.
  • Precision machined 316SS disc with two-piece stem (shaft) construction, enhances the flow capacity of the valve and reduces turbulence.
  • Stem utilizes PTFE/graphite bearings with V-type ring seals preventing leakage.
  • The bracket connected with the drive device conforms to ISO5211 standard;
  • The stem is designed to meet API 609 requirements with a blowout resistant design.

Material of 6 Inch Butterfly Valve:

No Part Material
1 Body ASTM A351 CF8M
2 Seal Ring Graphite + SS316
3 Retainer Flange ASTM A182 F316
4 Pin ASTM A276 316
5 Disc ASTM A351 CF8M
6 Stem ASTM A276 316
7 Stem Packing Graphite
8 Stem Beating SS316 + PTFE
9 Bolt ASTM A193 B8
10 Nut ASTM A194 8
11 Yoke ASTM A216 WCB