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Flushing Rings, also reffered to as drip rings are used between an isolation valve and the diaphragm seal of a pressure transmitter. 

Side ports on the rings allow media to be injected/ejected so that the diaphragm can be flushed free of deposits that affect transmitter measurement accuracy. 

Parker’s flushing rings are the same diameter as the flanges, bringing the valves clear of the flanges and eliminating the need for flushing port extension adapters. 

The flushing rings are held in place by through-bolts or captive studs, making them easy to install. 

The captive stud versions have the added advantage that the drip ring stays in place if either the process valve side or the diaphragm side requires removal. 

The flushing rings also have the benefit of allowing for size reduction. 

Parker produces a variety of tapered bore drip rings, typically with a 2” process-side flange and a 3” diaphragm-side flange to allow use of larger diaphragms for improved measurement accuracy without having to employ unnecessarily large and heavy valves. 

Parker can supply the drip rings ready-fitted with ball valves for flushing or needle valves.
Features
  • Integral welded valves, no threads or PTFE required
  • Easy to fit with through holes for studding
  • Captive stud option
  • Weld extensions gives added clearance away from chemical seal
  • Available in a range of corrosion resistant alloys

Specifications

Additional Options

  • Captive Studs

ANSI Flange Class

  • 150, 300, 600, 900, 1500, 2500

Bore Size (inch)

  • 2”

Bore Size (mm)

  • 50.8

Connection Size (inch)

  • 1/4”, 3/8”

Connection Style

  • A-LOK Twin Ferrule Fitting

Flange Face

  • Raised Face Spiral, Ring Typical Joint

Flange Size (inch)

  • 1/2”, 3/4”, 1”, 1-1/2”, 2”

Industry Applications

  • Flushing Chemical Seals, Flushing Out Waxing

Industry Standards

  • ANSI B16.5

Lower Stem Material

  • Needle Tip 17-4 PH

Material

  • Stainless Steel 316, Duplex, Super Duplex, Hastelloy C-276, 6Mo, 825, 625

Number of Ports

  • 1, 2

Packing Material

  • PTFE

Valve Type

  • Ball, Needle

  • Chemical injection
  • Process to instrument interface

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