Masoneilan 173 Series
Spring Loaded, Direct-Operated Back-Pressure Regulator

The Masoneilan 173 Series are spring loaded, direct-operated, pressure relieving or back-pressure regulators designed for steam, gas and liquid service.  They are available in ½” through 2” (DN15 through DN50) body sizes. These regulators are designed for continuous, rugged industrial use to provide years of reliable service.

General features:

• Flow to close design
• Available with ISA Face to face dimensions
• From 5 to 9 different CV’s for each size to assure high accuracy in regulation
• Metal or Sot Seat
• Internal pressure sensing (external on request)
• Wide range of actuators according to the requested regulation range
• Elastomeric or metal diaphragms
• Fully sealed construction available (suitable for dangerous medium; ATEX compliant)

Specifications

General Data

Function

Pressure Relieving / Back-Pressure

Service

Steam, Gas, Liquids

Sizes

½” to 2” (DN15-DN50)

Body

Ratings & Connections :

Screwed : NPT ½” through 2” (CN15-DN50)

Flanged : ASME CL150-CL600

Material : Carbon Steel, Stainless Steel, Other Alloys

Trim

Plug Type : Disc

Seat : Integral

Material : Stainless Steel (std.), others on request

Capacity : Cv ratings from 0.031 up to 32

Diaphragm Materials 

Polychloroprene, EPDM, FKM, Stainless Steel