PACSEAL HYDRAULICS KR-150 Technical specifications

MAINTENANCE INSTRUCTIONS
KR-150 Regulator
Rev A
Tel: [phone] Fax: [phone] Tamarack Ave, Brea CA USA pacsealhydraulics.com
All instructions, illustrations and item numbers refer to the
manual operated regulator, 40-1698. Refer to specific
installation drawing for corresponding items.
Repair Procedure
Preparation
1. Prepare a clean surface for disassembly, free of dust,
grease, grit, etc. A vise is not necessary, but helpful.
Have rags, degreasing solvent and lubricant available.
2. Critical surfaces to protect during disassembly are the
inside diameter of the piston guide 30, the inside
diameters of the seal container 28, the flat sealing
surfaces of the seal rings 11 and 13 and the flat
surfaces of the flow plates 23 and 24. Lapped surfaces
should NEVER come in contact with any hard surface.
3. All O-rings and back-up rings are recommended to be
replaced at a minimum. See the parts list for kit
contents.
4. Special tools used in assembly include a blunt ended
rod for seating backup rings, (step 4), medium strength
(blue) threadlocker (step 7) and a flat spacer about
3/16” thick for reinstalling the inlet and vent flanges
(step 8 and 10).
Disassembly
1. To relieve the compression on the internal operator
springs (20, 21) loosen the lock handle 17 and rotate
the adjustment handle 18 counter-clockwise until the
resistance is fully relieved. Springs must be loose to
safely remove the adjustment head.
Only qualified personnel should perform maintenance.
Be sure that system pressure has been VENTED prior to disassembly.

Rev A Page 2
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Maintenance Instructions KR-150 Regulator
2. With a 5/16” Allen wrench, loosen and remove
the socket head cap screws. Remove the
adjustment head 27 and spring assembly by
lifting and tilting and holding the spring plate 16
to clear the piston guide 30. Remove springs,
guide 25 and spring plate 16 and clean barrel
and all parts.
3. Remove the flange screws 34 from the inlet
flanges 31. Carefully remove these flanges
and attached inlet flow plates 23.
4. Remove the flange screws 34 from the vent
flanges 31. Carefully remove these flanges
and attached vent flow plates 24.
5. Remove the flow plates from each by
unscrewing the screws 33. Do not place the
flow plates lapped side down on any hard
surface.
6. From both sides of the body, remove the seal
rings (11,13), valve cage 14 and springs
(12,15) from the seal container. Carefully set
these aside.
7. Remove the outlet flange 32 by removing the
screws 34.
8. Remove the lower flange 22 by removing the
screws 34.
9. Using a soft tool, lightly tap the seal container
from the bottom to loosen the piston guide from
the body. Lift this assembly through the top of
the body.
10. Remove the piston 29 from the seal container
28 by removing the screw 36. Take care not to
scratch the bores of the seal container.
11. Remove all o-rings and back-up rings. Clean all
parts with a degreaser, wiping with clean rags.
12. Inspect all lapped surfaces for scratches, dings
or dull spots that would prevent them from re-
use. Inspect the bores of the seal container for
linear scratches that would propagate leaks.
Reassembly
1. Before replacing the seals and rebuilding the
regulator, apply a light coating of lubricant.
2. Replace all o-rings and back-up rings on seal
rings, flow plates, piston, piston guide and
flanges, lubricating generously.
3. Install the piston on the seal container, using
the screw, applying medium strength
threadlocker.
4. Carefully install the valve cage, wave spring
and vent seal ring from one side of the seal
container, then repeat with the supply seal ring
and spring. Use a soft, blunt tool to help
compress the back-up ring to engage in the
hole. From the opposite side, install the
springs. Then install the opposite seal rings.
5. Snug the piston guide over the piston.
6. Slide the seal container assembly down into
the top of the regulator body, making sure the
seal container faces are parallel with the
opposing ports and the notch faces the outlet.
7. Install the o-rings seated in the face grooves
before attaching the flanges to the flow plates,
using the screws and medium strength (blue)
threadlocker. Use rags to protect the flow
plate lapped surface and edges.
8. Important! To protect the seal rings in the seal
container during reassembly, ease the inlet
flow plates into the body using a 3/16” thick
spacer between the flange and the body to
prevent over-travel. Orient the flange so that
the retaining screws are parallel with the
bottom of the body. Remove the spacer.
9. Insert the screws and tighten screws in a cross
bolt pattern around the adapter flanges. The
inlet flow plate should be in light contact with
the seal rings.

Rev A Page 3
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Maintenance Instructions KR-150 Regulator
10. Important! In the same way, install the
opposite flange using the spacer to prevent the
flow plate from hitting the seal rings. Orient the
flange before seating it against the seal rings
as shown on the drawing. Evenly tighten all
screws.
11. Install the inlet flanges with their o-rings.
12. Repeat steps 8-10 for the vent flow plates and
flanges.
13. Install the outlet flange and bottom flange with
their o-rings, evenly tightening all screws.
Stand the regulator upright on the lower flange.
14. Place the spring plate on top of the piston
guide, then install the adjustment head,
aligning bolt holes and using a cross bolt
pattern tighten the bolts.
15. Apply grease on both springs and install into
adjustment head. Slide the spring guide into
the adjustment head. Use anti-seize or grease
to the plug threads and carefully thread into
the head. Apply grease to the adjustment
handle and install into plug, but do not engage
with the spring.
16. Once the regulator is installed in the system,
the output is to be adjusted to the desired set
point by rotating the handle clockwise. Secure
with lock handle.
Actual model not shown
ID Part # Description Qty Kit
123-1126 O-RING 1a
223-1263 O-RING 4a
323-1319 O-RING 2a
423-1322 BACK-UP RING 4a
523-1323 O-RING 6a
623-1325 O-RING 4a
723-1331 BACK-UP RING 2a
823-1332 O-RING 1a
923-1334 O-RING 1a
10 23-1343 O-RING 1a
11 40-0014 SEAL RING, SUPPLY 4b
12 40-0110 SPRING, SUPPLY 2b
13 40-0113 SEAL RING, VENT 2b
14 40-0114 VALVE CAGE 1b
15 40-0115 WAVE SPRING 2b
16 40-0134 SPRING PLATE 1
17 40-0135 LOCKING HANDLE 1
18 40-0136 ADJUSTMENT HANDLE 1
19 40-0140 PLUG, SEALING 1
20 40-0143 SPRING, OUTER GREEN 1
21 40-0144 SPRING, INNER GREEN 1
22 40-0197 FLANGE, LOWER 1
23 40-0285 FLOW PLATE, SUPPLY 2c
24 40-0286 FLOW PLATE, VENT 2c
25 40-0300 SPRING GUIDE 1
26 40-0323 BODY 1
27 40-0383 ADJUSTMENT HEAD 1
28 40-0714 SEAL CONTAINER 1d
29 40-0717 PISTON 1
30 40-0718 PISTON GUIDE 1
31 40-1383 FLANGE, INLET & VENT 4
32 40-1384 FLANGE, OUTLET 1
33 50-0066 SCREW 8
34 50-0069 SCREW 56
35 50-0239 HANDLE GRIP 3
36 50-0331 SCREW 1
Kit contents:
a. (40-1540) O-ring Kit
b. (40-1568) Seal Kit, includes O-ring Kit
c. (40-1541) Minor Repair Kit, includes Seal Kit
d. (40-1686) Major Repair Kit, includes Minor Repair Kit

Rev A Page 4
Tel: [phone] Fax: [phone] Tamarack Ave, Brea CA USA pacsealhydraulics.com
Maintenance Instructions KR-150 Regulator
KR-150 Manual Operated Regulator
40-1968

MAINTENANCE INSTRUCTIONS
KR-150 Regulator
Rev A
Tel: [phone] Fax: [phone] Tamarack Ave, Brea CA USA pacsealhydraulics.com
Troubleshooting
The KR regulators with manual operation in general
are not a precision device. There are large friction
forces from the shear seals which are balanced by
the springs. There is constant movement within the
valve which translates into observed pressure
fluctuations.
Excessive fluctuation may mean there is a leak
elsewhere in the system for which the regulator is
compensating.
To properly set the regulator, you need to open and
close the outlet a few times for it to settle on the set
pressure.
Technician Notes: