BULLETIN PD-08
Pulsation Dampeners
Pulsation Dampeners
Purpose
Neptune dampeners are installed on the
discharge side of positive displacement pumps
to remove the pulsating flow caused by the start
and stop action of the pump. Dampeners ensure
a smooth and continuous flow, eliminate pipe
vibration and protect in-line instrumentation.
Dampeners may also be installed at the pump inlet
as an inlet stabilizer to improve the NPSH condition
of the pump by reducing the acceleration pressure
losses due to the opening and closing of the inlet
ball valve.
MODEL
PD36PV
Features
• Lightweight, compact design
• Equipped with pressure gauge
and charging valve
• Easy in-line maintenance
• Pressure ratings to 1000 psi
with 4:1 safety margin
• Extensive range of plastics,
metals and elastomers
How They Work
MODEL
PD85SS
MODEL
PD36SS
A pressure chamber is divided by an elastomeric bladder. The lower portion of the
chamber is filled with the pumped liquid, the upper portion of the chamber contains
an air cushion. The air cushion is pre-charged to a pressure appropriate for the
operating condition. The energy from each pump discharge stroke displaces the
bladder into the air cushion allowing the dampener to absorb the energy. The air
cushion and bladder force liquid out of the bladder during the pump suction stroke.
Pulsation Dampener Selection
CHART #1
NEPTUNE PUMP MODEL 95% 90%
DEGREE OF DAMPENING
481 / 500 / 501 / 510 / 515 / 517 4 cu. inch 4 cu. inch
20 / 522 / 525 / 527 / 7000 / 7001 10 cu. inch 4 cu. inch
5
530 / 532 / 535 / 537 / 547 / 7020 36 cu. inch 36 cu. inch
562 / 565 / 567 / 7050 / 7070 85 cu. inch 36 cu. inch
6100 / 6150 36 cu. inch 10 cu. inch
6250 / 7101 / 7100 / 7120 / 7150 85 cu. inch 36 cu. inch
635 / 637 175 cu. inch 85 cu. inch
647 175 cu. inch 85 cu. inch
7200 / 7220 / 7250 370 cu. inch 85 cu. inch
CHART #2
GAS MODEL
VOLUME NUMBER
MATERIAL (VITON & EPDM (TEFLON
PD4SS–* 316SS 300 psi 300 psi
4 cu. inch
PD4PV–* PVC 150 psi N/A
PD4SSH–* 316SS 1000 psi 600 psi
PD4AL–* Alloy 20 300 psi 300 psi
PD10SS–* 316SS 300 psi 150 psi
PD10PVP** PVC PVC BLADDER ONLY: 150 psi
10 cu. inch PD10PV–* PVC 150 psi N/A
PD10SSH–* 316SS 1000 psi N/A
PD10AL–* Alloy 20 300 psi 150 psi
12 cu. inch PD12SSH–* 316SS 4000 psi 2000 psi
24 cu. inch PD24SSH–* 316SS 4000 psi N /A
PD36SS–* 316SS 300 psi 300 psi
36 cu. inch
PD36PV–* PVC 150 psi N/A
PD36AL–* Alloy 20 300 psi 300 psi
PD36SSH–* 316SS 1000 psi N/A
PD85SS–* 316SS 300 psi 150 psi
85 cu. inch
PD85PV–* PVC 150 psi N/A
PD85AL–* Alloy 20 300 psi 150 psi
PD85SSH–* 316SS 1000 psi N/A
PD175SS–* 316SS 300 psi 300 psi 2" FNPT 151⁄2" 8"
175 cu. inch
PD175PV–* PVC 150 psi N/A 2" FNPT 141⁄2" 9"
PD175AL–* Alloy 20 300 psi 300 psi 2" FNPT 15
PD175SSH–* 316SS 1000 psi 600 psi 2" FNPT 151⁄2" 8"
PD370SS–* 316SS 300 psi 150 psi 2" FNPT 231⁄2" 8"
370 cu. inch
PD370PV–* PVC 150 psi N/A 2" FNPT 23" 9"
PD370AL–* Alloy 20 300 psi 150 psi 2" FNPT 23
PD370SSH–* 316SS 1000 psi N/A 2" FNPT 231⁄2" 8"
* Add “V” to Model # for Viton Bladder; Add “E” to Model # for EPDM Bladder; Add “T” to Model # for Teflon®Bladder.
** This model available with PVC Bladder only.
PRESSURE RATING PRESSURE RATING
BLADDERS) BLADDER)
DAMPENER SELECTION
Use chart #1 to determine required dampener size in cubic
inches to obtain desired degree of dampening.
Use chart #2 to select the Model Number based on the
dampener size, material and pressure.
All units are equipped with pressure gauge and charging valve.
Charging Kit Accessory – Part No. CK701
Charging kit comprised of 8 foot of 5000 psi hose with
/4" NPTM fitting at one end for connection to nitrogen
1
bottle regulator and charging adaptor with purge valve and
gauge at other end.
®
CONNECTION OVERALL
SIZE/TYPE HEIGHT
3
⁄8" FNPT 51⁄2"3
3
⁄8" FNPT 5" 3"
3
⁄8" FNPT 51⁄2"3
3
⁄8" FNPT 51⁄2"3
3
⁄8" FNPT 7" 31⁄2"
1
⁄2" FNPT 61⁄2"3
1
⁄2" FNPT 6" 3"
3
⁄8" FNPT 7" 31⁄2"
3
⁄8" FNPT 7" 31⁄2"
1
⁄2" FNPT 7" 33⁄4"
1
⁄2" FNPT 91⁄2"3
3
⁄4" FNPT 81⁄2"6
3
⁄4" FNPT 9" 7"
3
⁄4" FNPT 81⁄2"6
3
⁄4" FNPT 81⁄2"6
3
⁄4" FNPT 12" 61⁄4"
3
⁄4" FNPT 12" 7"
3
⁄4" FNPT 12" 61⁄4"
3
⁄4" FNPT 12" 61⁄4"
1
⁄2" 8"
1
⁄2" 8"
DIAMETER
1
⁄2"
1
⁄2"
1
⁄2"
1
⁄2"
3
⁄4"
1
⁄4"
1
⁄4"
1
⁄4"
P.O. Box 247 • Lansdale, PA 19446-0247
Tel: 215-699-8700 • Fax: 215-699-0370
Toll-Free Tel: 1-888-3NEPTUNE (1-888-363-7886)
Toll-Free Fax: 1-800-255-4017
Web Site: http:// www.neptune1.com
E-mail: pump@neptune1.com
SOLD BY:
© 2008 Neptune Chemical Pump Company All Rights Reserved Bulletin PD-08 P/N ZL106964 Printed in U.S.A.
Loading...