FW MURPHY PD8100 Series Pulsation Dampener Instruction Manual

June 3, 2024
FW MURPHY

sect. 55 95145 rev. 2020/10/08
Pulsation Dampener

PD8100 Series

PD8100 Series Pulsation Dampener

The PD8100 Series eliminates pointer flutter on pressure indicating gage devices which are subject to pulsating pressure from reciprocating pumps or compressors. It also allows a close setting of high and low contact points providing for more accurate pressure indication and control of equipment.
The PD8100 Series decreases wear on geared movements and increases the life of pressure indicating instruments by eliminating excessive gage strain and unnecessary movement, a necessity which quickly pays for itself by protecting any pressure indicating and control instrument which is subject to pulsation.
PD8100 SERIES IS NOT FOR USE ON OXYGEN OR LIQUID OXYGEN APPLICATIONS.
The PD8100 is quality built with a large diameter valve stem wheel for ease of adjustment and features clearly printed operating instructions.
Machined from 1 3/8-inch (35 mm) hex bar stock, a two degree taper on the valve and stem assure positive dampening.
It’s available in brass, carbon steel, 303 stainless steel or 316 stainless steel to meet pressure and environmental requirements with either 1/2 NPT or 1/4 NPT inlet connections.

Dimensions

Specifications

See How to Order section for available inlet and outlet connections.
PD8183: All wetted parts are brass. Rated to 3000 psi (20.68 MPa) [206.80 bar].
PD8184: All wetted parts are carbon steel. Rated to 5000 psi (34.47 MPa) [344.70 bar].
PD8185: All wetted parts are 303 stainless steel. Rated to 10000 psi (68.95 MPa) [689.50 bar].
PD8190: All wetted parts are 316 stainless steel. Rated to 10000 psi (68.95 MPa) [689.50 bar].
Meets NACE standard MR- 01-75 for direct exposure to H2 S.
Operating Temperature: -15° to 400° F (-26° to 204° C).
NOT INTENDED FOR USE AS A SHUTOFF VALVE
Compressor Panel
The PDs are recommended for use on piston pumps and compressors to eliminate pointer contact flutter and gage wear.
Shown is a typical compressor panel featuring three
PDs and FW Murphy OPLFC gages.

Mounting

The PD8100 Series Pulsation
Dampener is mounted directly
below the OPLFS Pressure Gage.

Precautions: Do not block the inlet orifice. Use caution  when applying dope or Teflon tape on connection threads.

Diagram

A. 1/2 NPT inlet x 1/4 NPT outlet
A. 1/2 NPT x 1/2 NPT outlet

B. Bonnet Fitting
C. Valve Stem
D. Packing Nut
E. Hand Wheel (with 10-32 nut)
F. Strainer Bushing Assembly †
G. Molded Packing Gland
H. O Ring Bonnet Seal
J. Stainless Mesh Filter*
For 1/4 NPT inlet use with strainer bushing assembly † Provided only for units with 1/4 NPT inlet
**Provided in units with 1/2 NPT inlet.

How to Order

Options listed below. All configurations may not be available. Call your sales representative or FW Murphy for more information.

Approximate Shipping Weight and Dimensions

Model| Weight| Dimension
All models| 2 lb. 0 oz.| 4 3/4 x 4 3/4 x 3 1/4 in.
Part Number| Description| Notes
---|---|---
PD8183| PD8184| PD8185| PD8190| | Service Parts
55000179| 55000179| 55000179| 55000179| Hand Wheel (with 10-32 nut)
 55000174| 55000173| 55000175| ———–| Strainer Bushing Assembly,

In order to consistently bring you the highest quality, full-featured products, we reserve the right to change our specifications and designs at any time.
FW MURPHY product names and the FW MURPHY logo are proprietary trademarks. This document, including textual matter and illustrations, is copyright protected with all rights reserved. (c) 2021 FW MURPHY. A copy of our typical warranty may be viewed or printed by going to www.fwmurphy.com/warranty.

References

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