Giant 22947 User manual

Models

22947(H), 22948(H), 22949(H) & 22950(H)

Adjustable Unloader

Construction Characteristics

·Compact in size

·Interchangeable Valve Bodies

·Connection for pressure gauge, pressure switch and ow switch

Specications

Unloader Pressure Range

PSI (bar)

Maximum

Flow

GPM (L/min)

Minimum

Flow

GPM (L/min)

Maximum

Temperature

°F (°C)

22947(H) 300-1160 (20-80) 60 (225) 2.1 (8) 160 (70)

22948(H) 600-1600 (40-110) 60 (225) 2.1 (8) 160 (70)

22949(H) 1600-3200 (110-220) 32 (120) 2.1 (8) 160 (70)

22950(H) 3200-5800 (220-400) 16 (60) 2.1 (8) 160(70)

non-handwheel version shown

22947(H), 22948(H), 22949(H), 22950(H) Dimensions - in (mm)

Handwheel

Versions Non-Handwheel Versions

22947, 22948, 22949 and 22950

Non-Handwheel Versions Cut-through View and Parts

Item Part # Description Quantity

1 06730 Casing 1

2 12042 Tension Plug 2

2A 12043 Spring Tension Disc 2

3 12281 Retainer, Valve 1

3A 06732 Retainer, Discharge Valve 1

4 12045 Spring, Discharge Valve 1

4A 12118 Spring, Inlet valve 1

5 12046-0100 Ball Valve, Inlet (22947/22948) 1

5 12047-0100 Ball Valve, Inlet (22949/22950) 1

5A 05357 Spacer Disc 1

6 06733 Valve, Discharge 1

7 12282 Valve Seat, Discharge 1

8 06734 Valve Seat, Inlet (22947/22948) 1

8 06745 Valve Seat, Inlet (22949) 1

8 06746 Valve Seat, Inlet (22950) 1

9 12053 Cylinder 1

10 12054 Guide 1

11 06577 O-Ring 3

12 12056 Support Ring 2

13 12057-0001 O-Ring, Discharge Valve Seat 1

14 06736 O-Ring 2

15 12059 Piston 1

15 04846 Piston Body (22947) 1

16 12060 Spacer(22947) 1

16 12284 Spacer (22948/22949/22950) 1

17 04847 O-Ring for 15 (22947) 1

17 12283 Packing (22948/22949/22950) 1

17A 04848 Support Ring (22947) 2

18 06737 Piston Rod 1

19A 22618 O-Ring, Valve Stem 1

19B 12064 Spacer, Valve Stem 2

19C 12065 Key 1

19D 12066 Tension Sleeve 1

20 12067 Support Ring 1

20A 06738 Allen Screw 4

20B 01011-0400 Washer, Spring 4

21 12070 Disc 1

22 04850 Spring, Silver (22947) 23

22 12071 Spring, Yellow (22948) 19

22 12072 Spring, Red (22949) 19

22 12073 Spring, Orange (22950) 19

23 12074 Nut, Adjusting 1

23A+06739 Spacer Disc, 0.2mm 1

23B+06740 Spacer Disc, 0.5mm 2

23C+06741 Spacer Disc, 1.0mm 2

23D+06742 Spacer Disc, 5mm 1

24 06743 Nut, Locking 1

24A 06744 Tension Pin 1

25 07423-0100 Plug, 1/4" 6

25A 07161 Washer 6

+ May not be present. Quantity may vary.

Repair Kits

Unloader Kit Number Parts included:

22948/22949/22950 09619 11,12,13,14,17,19A,19D

22947 09813 4,4A,5,6,11,12,13,14,17, 17A

19A,19B,19D

22948 12081 4,4A,5,6,11,12,13,14,17,

19A,19B,19D

22949 & 22950 12082 4,4A,5,6,11,12,13,14,17,

19A,19B,19D

Sealing of Piston

Body for 22947

22947H, 22948H, 22949H and 22950H

Handwheel Versions Cut-through View and Parts

Item Part # Description Quantity

1 06730 Casing 1

2 12042 Tension Plug 2

2A 12043 Spring Tension Disc 2

3 12281 Retainer, Valve 1

3A 06732 Retainer, Discharge Valve 1

4 12045 Spring, Discharge Valve 1

4A 12118 Spring, Inlet valve 1

5 12046-0100 Ball Valve, Inlet (22947/22948) 1

5 12047-0100 Ball Valve, Inlet (22949/22950) 1

5A 05357 Spacer Disc 1

6 06733 Valve, Discharge 1

7 12282 Valve Seat, Discharge 1

8 06734 Valve Seat, Inlet (22947/22948) 1

8 06745 Valve Seat, Inlet (22949) 1

8 06746 Valve Seat, Inlet (22950) 1

9 12053 Cylinder 1

10 12054 Guide 1

11 06577 O-Ring 3

12 12056 Support Ring 2

13 12057-0001 O-Ring, Discharge Valve Seat 1

14 06736 O-Ring 2

15 12059 Piston 1

15 04846 Piston Body (22947) 1

16 12060 Spacer (22947) 1

16 12284 Spacer (22948/22949/22950) 1

17 04847 O-Ring for 15 (22947) 1

17 12283 Packing (22948/22949/22950) 1

17A 04848 Support Ring (22947) 2

18 04849 Piston Rod 1

19A 22618 O-Ring, Valve Stem 1

19B 12064 Spacer, Valve Stem 2

19C 12065 Key 1

19D 12066 Tension Sleeve 1

20 12067 Support Ring 1

20A 06738 Allen Screw 4

20B 01011-0400 Washer, Spring 4

21 12070 Disc 1

22 04850 Spring, Silver (22947) 23

22 12071 Spring, Yellow (22948) 19

22 12072 Spring, Red (22949) 19

22 12073 Spring, Orange (22950) 19

23 04851 Spacer Sleeve 1

23C+04852 Spacer Disc, 1.0mm 2

23D+04853 Spacer Disc, 5mm 1

24 04854 Nut, Locking 2

24A 04855 Tension Pin 1

24B 04856 Protective Sleeve 1

25 07423-0100 Plug, 1/4" 6

25A 07161 Washer 6

27 04857 Handwheel 1

+ May not be present. Quantity may vary.

Repair Kits

Unloader Kit Number Parts included:

22948/22949/22950 09619 11,12,13,14,17,19A,19D

22947 09813 4,4A,5,6,11,12,13,14,17, 17A

19A,19B,19D

22948 12081 4,4A,5,6,11,12,13,14,17,

19A,19B,19D

22949 & 22950 12082 4,4A,5,6,11,12,13,14,17,

19A,19B,19D

Sealing of Piston

Body for 22947

Giant Industries, Inc.

900 N. Westwood Ave.

Toledo, Ohio 43607

PHONE (419) 531-4600

FAX (419) 531-6836

www.giantpumps.com

08/19 22947-50.indd

Operation

The whole discharge must be guided through the valve. Should the actual operating pressure exceed the adjusted operating pressure, the valve then

acts as a pressure regulator. The valve switches to pressure-free bypass operation when the spray gun shuts off and the spray pressure between

gun and valve remains idle.

The valve can be operated together with several spray guns. It is also possible to connect several pumps to one common discharge line.

IMPORTANT! Valves are NOT SET when delivered. They become a SAFETY COMPONENT only after adjustment on the machine by trained

personnel.

Service and Adjustment

Re-servicing and adjusting work is only to be carried out by skilled tradesmen.

Safety Instructions

Observe direction of ow. The bypass must under no circumstances be closed or tted with any shut-off device.

Continuous bypass operatoin 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 (max. temperature 140 °F/60 °C); the duration is to be calculated by the operator and in conjunction with the operating

conditions.

2.) Use ttings (e.g. thermal valve on water inlet) to avoid heat increase.

To Adjust Pressure

1.) Open valve so that it is completely tension-free, i. e. loosen nut (24) and adjusting nut (23) so that the piston rod can be moved by hand.

2.) Spring pack is tensioned by adjusting nut (23) while the pump is running and with open gun (if more than one gun is used, all have to be open)

until required operating pressure is attained and no more water runs out on the bypass side. Then lock nut (24) to adjusting nut (23). If the nozzle

hole corresponds exactly to the ow-rate and pressure of the pump, no more water will run out over the bypass after the required pressure has

been attained.

If the nozzle hole is too small and the whole output won’t go through the nozzle after the max. pump pressure has been reached, on no account is

the valve to be adjusted higher than the max. operating pressure of the pump. In this case, the bypass should be partially left open. It is however,

advisable to install suitable nozzles.

To Renew Piston Rod Seals and Sleeves

Unscrew nuts (24+23). Remove spring pack (22). With a 6mm allen wrench, unscrew the 4 inner hexagon screws (20A) and remove spring support

(20). Remove woodruff key (19C) and remove inlet tensioning plug (2). Remove spring (4A), ball (5) and spacer disc (5A). Push out piston rod (18)

downwards together with inner parts (8, and 9). Remove piston body (15) with a size 19 wrench and pull piston rod out of guide case (10). Cut out

worn seals and replace. Then carefully clip O-ring (19A) and support rings (19B) onto the piston rod. Note order of installation. For 22948, 22949 and

22950, put packing (17) on piston rod (18). For 22947, put o-ring (17) and support ring (17A) on piston rod (18). Re-install guide sleeve (10) and

spacer (16). Check casing (1) surfaces and inner parts for dirt or damage as this will cause the seals to wear out quickly. Check O-rings (11&14) and

support rings (12) and replace as necessary. Remount piston body to piston rod with Loctite 648. Re-assemble in reverse order. Grease all parts

lightly with Silicone before reinstalling.

To Check and Replace Valves

Remove the plugs (2) and check whether the balls (5) or valve plate (6) are worn out. Remove valve seats (8, 7) with clipring pliers and check surfaces

for damage. Check O-rings (11) and replace as necessary.

22947(H), 22948(H), 22949(H), 22950(H) Operation and Maintenance

Troubleshooting Guide

Problem Cause Remedy

Valve switched

repeatedly when gun

is closed

Leaky Gun Repair gun

Leaky pressure pipe Seal pressure pipe

Leaky sleeve Replace o-rings

Worn out kick-back valve body Replace kick-back valve body or

o-ring or examine valve seat