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About This Item

 

Full Description

SCOPE

1.1 This Standard Practice establishes requirements for plastic industrial ball valves in nominal pipe sizes (NPS) ½ through 4, designed for general industrial systems for the distribution of pressurized liquids that are chemically compatible with the piping material. It reflects the industry practice for the design, manufacture, and application of these valves.

1.2 This Standard Practice applies to valves having the ball seal against two self-lubricating seats of the following types:

a) Union Ball Valves All joint ends have detachable nuts and end connectors.

b) Single Union Ball Valves Only one joint end has detachable nut and end connector, with the other joints being integral to the valve body.

c) Non-Union Ball Valves All joint ends are integral to the valve body.

1.3 This Standard Practice covers the following:

a) Materials of Construction

b) Pressure-Temperature Ratings and Design Requirements

c) Commonly Used Laying Length Dimensions

d) Safety Features

e) Port Size

f) Actuator Application Requirements

g) Production Tests

h) Markings
 

Document History

  1. MSS SP-122-2017


    Plastic Industrial Ball Valves

    • Most Recent
  2. MSS SP-122-2012

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    Plastic Industrial Ball Valves

    • Historical Version
  3. MSS SP-122-2005


    Plastic Industrial Ball Valves

    • Historical Version
  4. MSS SP-122-1997


    Plastic Industrial Ball Valves

    • Historical Version