Global Series Pump G25AN User manual

MAINTENANCE MANUAL DocNo.NDP472T‐00
AIR-OPERATED DIAPHRAGM PUMP
G25AN
Global Series Pump | Toll Free [phone] | www.globalseriespump.com
This maintenance manual covers what you should know about maintenance of the Global Series Diaphragm Pump.
This edition is based on the standards for the March 2016 run. Remember, the specifications are always subject to change; therefore,
some of the information is this edition may not apply to new specifications.
For safe use of this product, be sure to note the following: In this document, warnings and cautions are indicated by symbols. These
symbols are for who will operate this product and for those who will be nearby, for safe operation and for prevention of personal injury
and property damage. The following warning and caution symbols have the meanings described below. Be sure to remember their
meanings.
Warnings and CauƟons
If you ignore the warning described and operate the product in an improper manner, there is
danger of serious bodily injury or death.
If you ignore the caution described and operate the product in an improper manner, there is
danger of personal injury or property damage.
Furthermore, to indicate the type of danger and damage, the following symbols are also used along with those mentioned above:
WARNING
CAUTION
For your own safety, be sure to read these procedures carefully before performing maintenance on this product. After
reading this document, be sure to keep it handy for future reference.
WARNING
This symbol indicates a DON’T, and will be accompanied by an explanation on something you must not do.
This symbol indicates a DO, and will be accompanied by instructions on something you must do in a certain situation.
Before starting maintenance work, cut off the feed air and clean the pump. If air pressure or residue remain in the pump,
there is danger of explosion, or possible poisoning resulting in serious injury or death if chemicals adhere to the skin or are
accidentally swallowed. (For details on cleaning the pump, refer to Chapter 6 of the operation manual.)
When replacing parts, be sure to use the recommended genuine parts or Equivalents. Use of other parts may cause a
malfunction of the product. (Refer to Exploded View and Parts List to order correct item on the separate sheets.)
WARNING
When it is instructed that special tools must be used, be sure to use the specified tools. Otherwise, the pump may be
damaged.
Refer to 10.1 “Specifications” in the Operation Manual. Also, remember that the pump is heavy, and extreme care must be
taken when lifting it.
CAUTION

There are two diaphragms fixed to the center rod, one at each end. When compressed air is supplied to air chamber B
(right side, see Fig. 1.1), the center rod moves to the right, the material in chamber B is pushed out, and at the same
time material is sucked into material Chamber A.
When the center rod is moved full-stroke to the right, the air switch valve is switched, compressed air is sent to air
chamber A (left side, see Fig. 1.1), and the center rod moves to the left. The material in material chamber A is pushed
out, and at the same time material is sucked into material chamber B.
Through repetition of this operation, material is repeatedly taken in and discharge out.
Principles of Operation
Maximum Flow Rate……………
Port Size…………………………
Air Supply Pressure…………….
Liquid Temperature……………..
Maximum Air Consumption…….
Weight……………………………
Maximum Size Solid……………
NPT Dimensions………………..
Air Inlet…………………………..
Body Material……………………
Discharge Volume Per Cycle….
Slurry Limitation…………………
Limited Viscosity………………..
Maximum Operating Noise…….
37 GPM
1” Female NPT
30-100 PSI
32-180 F
30 SCFM
17.4 lbs.
1/8”
8.25”L x 8.5”W x 12.4”H
3/8” Female NPT
Aluminum (ADC-12)
0.158 Gallons
3mm or <
3Pas
81dB (pressure level)
Technical Specifications
Discharge volume (per cycle) varies according to use
conditions.
Test Conditions: Clear Water (room temperature)
Performance Curve
Buna N
Neoprene™
Santoprene®
Elastomeric Options
EPDM (Nordel)
Hytrel®
Viton®
G25AN

Retightening Torque
Fasteners components - bolts or nuts should be retightened
before starting operation and if you find fluid leakage on daily
inspection. Retightening torque for each part is shown in
Table 1.
Out Chamber Bolt Manifold Bolt
10 N.m
[8 ft-lbs]
10N.m
[8ft-lbs]
Table 1.
Pump Disassembly
Remove the 4 retainer bolts from the out manifold,
and remove the out manifold.
1.
Remove the ball, O-ring and valve seat.
2.
3. Turn over the main body assembly and remove the
4 retainer bolts from the manifold and remove the
in manifold and pump base (and feet, if available).
4. Remove the O-ring, valve seat and ball.
5. Remove the 12 retainer bolts from the out chamber
and remove the out chamber.
1.
2.
3.
4.
5.
Remove the nuts on both sides of the center rod.
After the nuts on one side have been removed,
remove the center disk and diaphragm. Remove
the diaphragm, center disk and center rod from the
opposite side of the main body.
Remove the nuts on the opposite side. Remove the
coned disk spring, center disk and diaphragm.
6.
6.
Remove the 2 bolts from plate B and remove plate
B, gasket and spool assy.
7.
Remove the 4 bolts from plate A and remove plate
A, gasket and silencer.
8.
Remove the 2 bolts from plate C and remove plate
C and gasket.
9.
Using plate B, remove pilot assembly, spring, seat
and O-ring. Repeat on other side.
10.
For reassembly, reverse the above procedure steps.
8.
7.
10.
9.
Other side
10.

Ref.No. PartsNo. Description Qty. Ref.No. PartsNo. Description Qty.
1 770720 BALL20N 4 13‐7 773311 SLEEVE 1
2 640041 O‐RING 4 13‐8 640130 O‐RING 1
3 581130 SEAT 4 13‐9 630804 STOPRING 1
4 716959 OUTCHAMBER 2 14 611175 BOLT 20
6 772962 DIAPHRAGM 2 15 631917 WAVEWASHER 20
7 716958 CENTERDISK 2 16 611101 BOLT 8
8 717030 CENTERROD 1 17 631915 WAVEWASHER 8
10 716258 CENTERDISK 2 18 717037 MANIFOLD2
11 716259 WASHER 2 19 717036 PLATEA1
12 717031 BASE2 20 773288 GASKET 1
13 805126 BODYASSY1 21 709161 RESETBUTTON 1
13‐1 716955 BODY1 22 640005 O‐RING 1
13‐2 805127 PILOTASSY2 23 716957 PLATEB1
13‐3 773310 SEAT2 24 773289 GASKET 2
13‐4 640013 O‐RING 2 25 581132 PLATEC1
13‐5 708666 SPRING 2 26 805128 SPOOLASSY 1
13‐6 685414 V‐PACKING 2 27 686762 SILENCERNPT3/8" 1
Exploded View
Parts List
Hytrel® is a registered trademark of E.I. du Pont de Nemours and Company. Kynar® is a registered trademark of Arkema. Nordel™ is a trademark of DuPont Dow Elastomers.
Santoprene® is a registered trademark of Monsanto Co. Viton® is a registered trademark of DuPont Performance Elastomers.