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Description
The PD8100 Series eliminates pointer flutter
on pressure indicating SWICHGAGE
®
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 exces-
sive 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 NOT FOR USE ON
OXYGEN OR LIQUID
OXYGEN APPLICATIONS.
Quality built with a large diameter valve stem
wheel for ease of adjustment with clearly printed
operating instructions. Machined from 1-3/8 in.
(35 mm) hex bar stock. A two degree taper on
valve and stem assure positive dampening.
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.
Specifications
See “How to Order” section for available inlet
and outlet connections.
PD8183: All wetted parts are Brass. Rated to
3,000 psi (20.68 MPa) [206.80 bar].
PD8184: All wetted parts are Carbon steel.
Rated to 5,000 psi (34.47 MPa) [344.70
bar].
PD8185: All wetted parts are 303 stainless
steel. Rated to 10,000 psi (68.95 MPa)
[689.50 bar].
PD8190: All wetted parts are 316 stainless
steel. Rated to 10,000 psi (68.95 MPa)
[689.50 bar]. Meets NACE standard MR-
01-75 for direct exposure to H
2
S.
Operating Temperature:
-15 to 400°F (-26 to 204°C)
Shipping Weight (all models):
2 lbs.(0.9 kgs.)
Shipping Dimensions (all models):
4-3/4 x 4-3/4 x 3-1/4 in. (121 x 121 x 83 mm)
Warranty
A limited warranty on materials and workmanship
is given with this FW Murphy product. A copy of
the warranty may be viewed or printed by going to
www.fwmurphy.com/support/warranty.htm
PD-95145B
Revised 11-03
Catalog Section 55
(00-02-0125)
Pulsation Dampener
PD8100 Series
■
Used On Controllers, Instruments and
Recorders to Dampen Pressure Pulsation
■
Eliminate Gage Pointer Flutter
■
Aids In Providing More Accurate
Pressure Indication
■
Decreases Wear On Gage’s
Geared Movement
NOT INTENDED FOR USE AS A SHUTOFF VALVE
RUN
START
MURPHY SWICHGAGE
MURPHY SWICHGAGE
MURPHY SWICHGAGE
MURPHY SWICHGAGE
RUN
START
MURPHY SWICHGAGE
MURPHY SWICHGAGE
Eliminate pointer flutter
like this.
Make SWICHGAGE
®
instruments
and recorders operate like this.