Pulsafeeder Isochem GMH8 Series User Manual (English)

Questions and Answers:

N
natalie67Aug 16, 2025
Why is my Pulsafeeder Water Pump motor running hot?
- P
  Paul CarrollAug 16, 2025
  It's normal for motors to feel hot, even when not overloading, so first check the motor amp draw to be sure. If it is indeed overheating, consider the following: * The discharge pressure may be too high; lower the pressure and check the pressure relief valve setting and for defective discharge pressure gauge. * The liquid viscosity might be higher than expected; thin the liquid or install a larger motor. * The rotational speed could be too high; reduce the speed. * There might be binding internal pump parts; inspect and correct the condition. * The motor could be wired incorrectly; check the wiring diagram.
R
Rachel BurtonAug 23, 2025
What to do if Pulsafeeder Isochem GMH8 has low liquid delivery?
- D
  Dominic SmithAug 23, 2025
  If your Pulsafeeder Water Pump has low liquid delivery, consider these potential causes: * The discharge pressure might be higher than expected; reduce the pressure. * There could be an air leak in the suction; locate and repair the leak. * The rotational speed might be incorrect; check the speed and wiring. * The inlet may be obstructed or clogged; remove the restriction. * The liquid viscosity might be higher than expected; thin the liquid or accept lower flow. * The relief valve could be leaky; correctly set or repair the relief valve. * There might be insufficient suction pressure; increase the suction pressure. * Internal parts may be worn or damaged; inspect and repair as required.
S
Sharon CastilloAug 29, 2025
How to fix a noisy Pulsafeeder Isochem GMH8?
- C
  Christopher ScottAug 29, 2025
  A noisy Pulsafeeder Water Pump could be due to several reasons: * The pump may be cavitating; increase suction pressure to provide sufficient NPSH. * The pump might be worn or damaged; inspect and repair as required. * There could be air or gas in the liquid; eliminate the air or gas. * Foreign particles might be in the liquid; install (or clean) a strainer in the inlet pipe.
J
jenniferdukeSep 3, 2025
Why does my Pulsafeeder Water Pump gradually lose prime?
- C
  Charles Hughes Jr.Sep 4, 2025
  If your Pulsafeeder Water Pump gradually loses prime, it could be due to: * An air leak in the suction; locate and repair the leak. * The suction lift being too high; increase suction pressure. * Air or gas in the liquid; eliminate the air or gas. * The pump being worn or damaged; inspect and repair as required.

Pulsafeeder Isochem GMH8 Series Specifications

General

Model	GMH8 Series
Stroke Adjustment	Manual
Materials (Liquid End)	PVC, 316 SS, Hastelloy C
Diaphragm Material	PTFE
Motor Voltage	115/230 VAC
Motor Enclosure	TEFC
Dimensions	Varies by configuration
Suction Lift	10 ft (3 m)

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