Pulsafeeder GLM1, GLM2, GLM6, GLM3, GLM4 Installation Operation & Maintenance
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PULSA® GLM
Bulletin: IOM-GLM-5000-Rev.A
Installation, Operation &
Maintenance Manual
Models: GLM1 – 6
MECHANICAL DI APHRAGM
METERING PUMP
Pulsafeeder Fact ory Service Pol icy
Pulsafeeder’s Factory Service Policy is maintained on its website. Please source this document at
this URL:
http://www.pulsa.com/downloads/pdf/Pulsafeeder%20EPO%20Limited%20Warranty%20Statement.pdf
Safety Considerations:
1. Read and understand all related instructions and documentation before attempting to install or
maintain this equipment.
2. Observe all special instructions, notes, and cautions.
3. Act with care and exercise good common sense and judgment during all installation,
adjustment, and maintenance procedures.
4. Ensure that all safety, work procedures, and standards that are applicable to your company and
facility are followed during the installation, maintenance, and operation of this equipment.
Copyright ©2015 Pulsafeeder, Inc. All rights reserved.
Information in this document is subject to change without notice. No part of this publication may be
reproduced, stored in a retrieval system or transmitted in any form or any means electronic or
mechanical, including photocopying and recording for any purpose other than the purchaser’s
personal use without the written permission of Pulsafeeder, Inc.
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Table of Contents
1. EQUIPMENT INSPECTION ....................................................................................................................... 1
2. INSTALLATION ...................................................................................................................................... 1
2.1 Location ....................................................................................................................................... 1
2.2 Motor ............................................................................................................................................ 1
2.3 Piping System ............................................................................................................................. 2
2.4 Suction Pressure Requirements ............................................................................................... 3
2.5 Discharge Pressure Requirements ........................................................................................... 4
3. EQUIPMENT STARTUP .......................................................................................................................... 5
3.1 Fastener Inspection .................................................................................................................... 5
3.2 Output Adjustment ..................................................................................................................... 5
3.3 Priming the Reagent Head ......................................................................................................... 5
3.4 Calibration ................................................................................................................................... 7
4. MAINTENANCE ..................................................................................................................................... 7
4.1 Lubrication................................................................................................................................... 8
4.2 Wet End Removal, Inspection, & Reinstallation ...................................................................... 9
4.3 Check Valv es ............................................................................................................................... 11
4.4 Motor Removal & Reinstallation ................................................................................................ 13
4.5 Pump Head Removal .................................................................................................................. 14
5. REPLACEMENT PARTS ......................................................................................................................... 15
5.1 KOPkit® Program......................................................................................................................... 15
5.2 Ordering KOPkits or Parts ......................................................................................................... 15
5.3 KOPkit numbers by model ......................................................................................................... 15
6. TROUBLESHOOTING ............................................................................................................................. 16
7. PIPING ACCESSORIES .......................................................................................................................... 17
8. DIMENSIONAL DRAWING ....................................................................................................................... 19
9. Policies & Procedures .................................................................................................................... 21
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1. Equipment Inspection
Figure 1: Foot Valve Kit
Check all equipment for completeness against the order and for any evidence of shipping damage.
Shortages or damage must be reported immediately to the carrier and your authorized representative or
distributor of PULSA GLM pumps.
Included Items:
• PULSA GLM Metering Pump with Motor Adaptor
Optional Items:
• Motor
• Foot Valve Kit (provided on PULSA GLM models 1 and 2 only).
2. Installation
2.1 Location
When s electing an installation site or designing a chemical feed system, plan for operation and routine
maintenance. Provide 3.25 ft ( 1 m) of space around the pump for this purpose.
PULSA GLM pumps are designed to operate in an environment where the pump is protected from direct
sunlight, and precipitation (i.e., under shelter). The ambient temperature must be between 32°F (0°C) and
104°F (40°C). If necessary add environmental controls.
The pump must be rigidly bolted to a solid and flat foundation to minimize vibration and prevent loosening
of the connections. The pump must be level within 5° to assure proper check valve operation.
2.2 Motor
The PULSA GLM is not typically shipped with the motor pre-installed. It must be mounted and wired in
accordance with local and national requirements by a qualified electrician. Please refer to the motor
nameplate for further manufact ure specific information.
If the PULSA GLM was purchased less motor, please refer to section 5.4 Motor Installation for further
instructions.
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2.3 Piping System
Figure 3: Discharge P&ID
Figure 2: Suction P&ID
Attention to piping detail will assure an easy startup and long life of your GLM. Please follow these guidelines:
Suction Piping
Isolation Valve and Unions: Isolation valves allow
the system to be isolated from the process fluid to
facilitate safe servicing. They also aid in the operation
of Calibration columns. Valves should include good
visible indications of open/closed condition. Unions
assist with installation and maintenance. Valves that
integrate union fittings are ideal.
Strainer: Successful installations always include a
strainer on the suction side of the pump to exclude
material that can cause the check valves to
malfunction or the diaphragm to rupture. Select the
material, size and mesh to be compatible with the fluid
type, intended flow rate and service interval. A 100
mesh screen is generally recommended.
Calibration Column (Optional): Used to calibrate pump performance. Include an isolation valve and
vent line back to the supply tank to facilitate safe operation.
Pressure Gage (Optional): A pressure gage should be included on the suction side of the pump when
the suction pressure of the system is unknown or variable. The gage is also a good indicator of Strainer
maintenance status.
Discharge Piping
Discharge Pressure Gage: Install a pressure gage no less than 2 pipe diameters from the threaded
fitting on the discharge valve. A discharge pressure gage is critical to confirming proper operation of the
pump and setting the pressure relief and back pressure valves.
IMPORTANT: DO NOT Install an elbow directly into the discharge valve threaded fitting as it will
create excessive back pressure that can lead to premature diaphragm failure.
Pressure Relief Valve: Install a Pressure Relief Valve as close
to the pump as possible. Using the leg of a T fitting for this
purpose is acceptable (with the normal discharge taking the
straight path and the relief flow taking the leg). The relief
pressure must be set at or below the rated pressure indicated
on the pumps nameplate.
NOTE: Failure to install and properly set a
Pressure Relief Valve can lead to damage of the
Pumps drive mechanism that will not be covered
under warranty.
Back Pressure Valve: Install a Back Pressure Valve to
generate a consistent Back Pressure to the pump for accurate
operation and to prevent siphoning.
Pulsation Dampener: Reciprocating diaphragm metering
pumps only discharge fluid for ½ of a pump cycle. A Pulsation
Dampener will smooth the associated flow/pressure variation to
the downstream process.
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Piping System Recommendations
1. When making the threaded joint to the valve cap assembly, use a sealing compound chemically
compatible with the process material (for example Loctite
®
8551 [Loctite® is a registered trade mark of
Henkel Corporation] for water service). Do not use sealing tape. The valve cap should be tightened by
hand and then tightened one additional turn (i.e., 360°) with the aid of an adjustable wrench.
2. Both new and existing piping should be cleaned, preferably by flushing with a clean liquid
(compatible with process material) and blown out with air, prior to connection to the pump.
Note - Debris from manufacturing the pip ing system (e.g., PVC shavings, TFE Tape, dirt, etc.)
can be unknowingly assembled inside the pipe. When fluid is introduced this material c an be
transferred to the pump and prevent proper check valve operation. This is a common startup
issue.
3. Piping weight must not be supported by valve housings or other portions of the reagent head, as the
resulting stresses can cause leaks. Valve loads must not exceed 10 ft-lbf (13.5 n-m) moment or 5
lbf (22 n) in any direction. When temperature variations are expected provide for thermal expansion
and contraction of piping components so that force and/or moments are controlled within the
allowable range.
4. When making process connections, ensure that pipe joint cement and thread sealants do not run
into the check valve assemblies as this will inhibit valve operation. This is a common startup issue.
2.4 Suction Pressure Requirements
Although PULSA GLM metering pumps have some suction lift capability, a flooded suction (i.e., suction
pressure higher than atmospheric pressure) is preferable whenever possible. The pump should be
located as close as possible to the suction side reservoir or fluid supply source.
For fluid with a vapor pressure of 5 psia (0.35 bar) or less (at operating temperature) the wet suction lift
capability is approximately 10 ft (3 m). If this requirement is not met, the pump will not provide reliable,
accurate flow. In suction lift conditions, the use of a foot valve is recommended at the lowest point of
the pickup tube or pipe. Pumps operating under suction lift conditions may require some liquid priming
before they will operate reliably.
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2.5 Discharge Pressure Requirements
All PULSA GLM metering pumps are designed for continuous service at the rated discharge
pressure. If the s ystem suction pressure exceeds the discharge pressure (a condition sometimes
described as “pumping downhill”), flow will be generated in addition to that generated by t he pump.
This results in a reduction in accuracy and loss of control over the metering process. To prevent this
flow-through condition, the discharge pressure must exceed the suction pressure by at least 5 psi
(0.35 bar). This can be achieved, where necessary, by the installation of a backpressure valve in the
discharge line.
Conditions where the actual discharge pressure exceeds the pumps rating are to be avoided as they
will cause damage to the pump components.
Figure 4: PULSA GLM P&ID
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