Giant 22980 User manual

Industrial Unloader/Regulator
(High Pressure)
Item Part# Description Quantity
1 08500 Casing 1
2 06880 Spring Guide 1
3 07381 Inner Hexagon Screw 4
4 08503 Inner Hexagon Screw 1
5 08504 Stud Bolt 1
6 08505 Hand Wheel 1
7 08506 Hexagon Nut 3
7A 08882 Washer 2
8 08507 Disc 2
9 08508 Bearing Part I 1
10 12323 Axial Bearing 1
11 08510 Bearing Part II 1
12 12218 Spring Plate 18
13 06714 Centering Disc 1
14 06687 Piston 1
15 06715 Seal Support 1
16 06713 Hexagon Nut 1
17 06716 Cylinder 1
18 12004 O-Ring 1
19 08519 Spacer Ring 1
17 06716 Cylinder 1
20 08520 Guide Ring 1
21 07392 Support Ring 1
21A 06718 Support Ring 1
22 07391 Seal Pack 1
22A 06717 Seal Ring 1
23+08523 Valve Seat (22980) 2
2308523 Valve Seat (22980R) 1
24 08524 Valve Plug 2
25+07489 O-Ring (22980) 2
2507489 O-Ring (22980R) 1
26+12057 O-Ring (22980) 2
26 12057 O-Ring (22980R) 1
28 08530 Spacer Pipe (22980) 1
29+08531 Valve Plate (22980) 1
30+12216 Valve Spring (22980) 1
30 07423-0100 Plug, 22980R (not shown) 4
32 06934 Seal, 22980R (not shown) 4
+ 09543 Unloader Repair Kit
 09547 Regualtor Repair Kit
Models
22980 - Unloader
22980R - Regulator
Operating Specications
U.S. Metric
Max. Pressure: 7250 PSI (500 bar)
Maximum Flow: 26.4 GPM (100 l/min.)
Minimum: 2.1 GPM (8.0 l/min.)
Maximum Temperature: 160oF 70°C
Inlet Port: 3/4" BSP
Outlet Port: 1/2" BSP
Bypass: 1/2" BSP
Weight: 15.4 lbs.

SAFETY INSTRUCTIONS
IMPORTANT!

󰀨
IMPORTANT! Continuous bypass operation without
releasing the water can cause the liquid to heat up which in
turn could damage the unit and endanger persons.
Possible preventive measures:
1. Limit the bypass duration (maximum temperature
160 °F [70 °C]); the duration is to be calculated by the
operator and in conjunction with the operating conditions.
 
avoid heat increase.
SERVICE AND ADJUSTMENT
Servicing and adjusting work is only to be carried out by a
skilled tradesman.

Relieve the spring pack by means of the hand wheel (6).
Screw out the four inner hexagon screws (3). Remove the
spring guide (2) along with the spring plates (12) and hand
wheel. CAUTION: The hexagon nuts (7) are not to be
shifted from the set position. These are the locking
nuts to retain the maximum adjusting pressure. Note
the sequence of the spring plates (12) for reassembling.
Push out complete piston assembly (13-22A) over the bypass.
Hold piston (14) with size 10 wrench and remove hexagon
󰀨
(13), spacer ring (19) and guide ring (20) together with seals
from piston (14). Take note of the sequence for reassembling.
Check inner cylinder surface (17) and piston surface (14).
Check seals and replace as necessary. Dirt or damage will
cause seals to wear out quickly.
Grease all parts lightly with silicone before reinstalling.
Tighten hexagon nut (16) to 18.5 ft.-lbs. (25 Nm).
Center bypass valve seat (23) within casing and tighten to
111 ft.-lbs. (150 Nm) with valve plug (24). Thereafter, insert
complete piston unit from the above side. Fit spring guide
    
inner hexagon screws (3) at 36 ft.-lbs. (49 Nm).

Screw out plugs (24 or 28), pull out spacer pipe (28)
underneath plug (24 or 28). Check whether the valve plate
(29) underneath or the piston (14) are worn out. Remove
valve seats (23) and check sealing surfaces and o-rings for
damage. Replace as necessary.

The spring packing is pre-tensioned by means of the hand
wheel (6) while the pump is running and the gun is open (in
the case of more than one gun, all guns have to be open)
until required operating pressure is reached. If adjustment
 
through the bypass. The hexagon nut (7) is then to be
locked to the spring guide (2).
IMPORTANT! If the nozzle hole is too small, on no account
is the valve to be adjusted to an operating pressure higher
than that of the pump. It is advisable in this case to install
nozzles more suitable for this purpose.
06/22 22980(R).INDD
© Copyright 2022 Giant Industries, Inc.
Giant Industries, Inc.
900 N. Westwood Ave.
Toledo, Ohio 43607
419-531-4600
419-531-6836 Fax
www.giantpumps.com
22980 & 22980R
DIMENSIONS (INCHES)
WARNING: This product might contain a chemical known
to the State of California to cause cancer, and birth
defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
DEFECT CAUSE REMEDY
Valve switches on &
󰀨
gun is closed
Gun Leaking Repair/Replace Gun
Leak in
Discharge Line
Identify & Fix Leak
Seal Ring (22) leaks
Kick-Back valve is
defective
Replace Seal Ring.
Check valve seat
(23), valve plate (29),
spring (30) & o-ring
(25).
Leakage at spring
guide
Piston Seal (22A)
Leaking
Replace Seal Ring
(22A)
Cylinder o-ring (18)
leaks
Replace o-ring (18)
Switches to Bypass
while gun is open
Nozzle too small/Too
much water
Install larger nozzle
Bypass valve worn Replace piston (14),
bypass valve seat
(23) & o-ring (25)
Pressure gauge
reading jumps when
󰀨
Valve activation
pressure is set
higher than operating
pressure
Turn hand wheel to
operating pressure
level and secure with
locknut (7)
Dirt in valve Clean valve of any
deposits. Grease
parts before
reassembly