UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

MSS SP 88

Diaphragm Valves

active, Most Current
Buy Now
Organization: MSS
Publication Date: 1 January 2015
Status: active
Page Count: 16
scope:

This Standard Practice applies to valves for general liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a diaphragm acting in conjunction with a separate or integral disk-member sealing against a seat, having equal sealing capability in either flow direction, and having diaphragms being essentially made of elastomeric or plastic material or combinations thereof.

This Standard Practice defines the following categories of valves:

a) Class 125 or 150 Valves (see Section 2.1)

b) Standard Valves (see Section 2.2)

c) Valves for Special (Low Pressure) Applications (see Section 2.3)

The purchaser, when referencing the Standard Practice, shall also specify the appropriate category as listed above.

This Standard Practice covers the following:

a) Pressure-Temperature Ratings and Design Requirements

b) Commonly Used Diaphragm Pressure Limitations

c) Body, Bonnet, and Bolting Materials

d) Commonly Used Face-to-Face Dimensions for Flanged Valves

e) Body End Connections and Wall Thicknesses

f) Actuator Application Requirements

g) Tests h) Marking 

For specific requirements relating to the dairy industry, refer to 3-A SSI 54-02.

PURPOSE

The purpose of this Standard Practice is to outline the limitations and requirements of valves in which a nonmetallic, resilient diaphragm is used to separate the working parts of the valve from the line fluid and also functions in conjunction with other parts as valve closure-member.

The use of a nonmetallic, resilient diaphragm causes valves described in this Standard Practice to be different from other commonly used valves for which general and specific Standards and Standard Practices are in existence. These differences include pressure-temperature limitations, face-to-face dimension requirements, and specific service characteristics.

This Standard Practice reflects industry practice in the design, manufacture, and application of this type of valve.

Document History

MSS SP 88
January 1, 2015
Diaphragm Valves
This Standard Practice applies to valves for general liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a diaphragm acting in conjunction...
January 1, 2010
Diaphragm Valves
This Standard Practice applies to valves for gen-eral liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a diaphragm acting in conjunction...
January 1, 1993
Diaphragm Type Valves
A description is not available for this item.
January 1, 1993
Diaphragm Valves
This Standard Practice applies to valves for general liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a diaphragm acting in conjunction...

References

Advertisement