Parker CK-2W User manual

Contact Information:
Parker Hannin Corporation
Refrigerating Specialties Division
2445 South 25th. Avenue
Broadview, IL 60155-3891
phone [phone]
fax [phone]
www.parker.com/refspec
Product Bulletin 50-32
Gas Powered Suction
Stop Valve
Type: CK-2W
Size: 50 mm (2”)
Design Pressure Rating: 32 bar (464 psig)
Purpose:
The CK-2W, normally opened, gas
powered suction stop valve are used
in low temperature applications to
positively close suction lines and
both, liquid leg and gas return, on
ooded evaporators. This valves
improved design has a higher
working pressure, greater working
temperature range, and minimizes
the effects of system impurities
for a more durable operation. The
CK-2Ws most benecial features
are its stainless steel and aluminum
construction, which allows it to
withstand corrosive environments
and its overall light weight minimizes
installation costs.
Product Features:
Suitable for Ammonia, CO •
2, R-22,
R-404a, and other common
refrigerants
Designed with corrosion resistant •
material – 304 stainless steel and
aluminum
No body wearing surfaces •
Stainless steel components are •
resistant to wiredrawing
Normally open •
Variable Flow Regulator (VFR) to •
reduce slamming
Design drastically reduces foreign •
material
Light weight •
Can be mounted in a horizontal and •
vertical position
Fluid temperature rating: -60 •
oC to
116oC (-76oF to 240oF)
Ambient temperature rating: -40 •
oC
to 60oC (-40oF to 140oF)
Complies with Pressure Equipment •
Directive 97/23/EC
Patent Pending

Page 2 / Bulletin 50-32
Port Size Connection Size
(SW, BW) Body Size Kv Cv
50 mm (2”) 1-1/2”, 2” 2” 49.7 58
CK-2W Port, Connection, and Flow Coefficient Table
CK-2W Cross Section
Coil
Opening
Spring
Plug (Piston)
Stainless
Steel Body
Aluminum
Port Plate
Passage (T)
Passage (P)
Seal Cap
Manual
Opening
Stem Strainer
Solenoid
Pseudo
Assembly
Solenoid
Seat
Assembly
Variable Flow
Regulator (VFR)
Description
e CK-2W gas powered suction stop
valves are an integrated assembly of
two modules:
A body, which contains the1.
modulating plug, but is ordered to
suit a particular connection size.
e port size denes the size of the
body;
A port plate, which contains the2.
pilot plug, coil, high pressure inlet,
and strainer.
e CK-2W is a normally opened valve
furnished with socket weld and weld
neck options only. e valve requires
a high pressure source of 0.35 bar
(5psi) above the downstream pressure
to close. Due to the modulating
plug sprint, no line pressure drop is
required to open the valve. erefore,
on suction line applications pressure
drop is nominal and on ooded
evaporators normal gravity circulation
is unrestricted. Using pressure to
close, this valve can overcome sticking
at low temperatures caused by the
presence of viscous oil.
is unique design allows the check
valve to be welded into the line
without disassembly, yet provides full
access for cleaning and servicing from
the top only.
Principle of Operation
Gas from a high pressure source is
connected to the valve pilot port
through passage (P). To close the CK-
2W the solenoid is energized allowing
high pressure to ow through the
strainer, solenoid seat, pilot plug and
into the chamber above the piston.
e higher pressure above the piston
forces the piston down against the
opening spring and closes the valve.
e valve will not close unless the
high pressure source exceeds the
downstream pressure by at least 0.35
bar (5 psi). To open the valve simply
de-energizes the solenoid to stop the
ow of high pressure to the top of the
piston. e high pressure above the
piston equalizes to the downstream
pressure through the piston bleed hole
and piston opening spring forces the
valve open.
Variable Flow Regulator (VFR)
Principle of Operation
e unique pilot plug, VFR, design
helps reduce the initial ow of high
pressure gas, which prevents the valve
from slamming closed as shown in the
principle of operation cross-section
steps 1 through 3.
When the solenoid is energized and
the high pressure gas hits the top
of the internal VFR plug the spring
compresses, pushing the VFR plug
downward, only allowing the gas
to travel through the smaller orice
as shown in the CK-2W principle of
operation cross section step 2 diagram.
When the pressure exceeds the piston
spring force the valve closes and the
VFR plug equalizes, opening up the
orice to the area above the piston.
is design prevents valve slamming,
while as the same time maintaining
the pressure required to maintain the
valve closed.

Bulletin 50-32 / Page 3
CK-2W Principle of Operation Cross Section
Passage Description
P Piston Pressure, Top
TOutlet Pressure
MManual Opening Stem
CK-2W Port Plate Passage Table
VFR Spring
(Normal Position)
Step 1: Initial VFR Position (Coil De-Energized)
Step 2: Compressed VFR Spring Position (Coil Energized)
Step 3: Final VFR Position After Equalization (Coil Energized)
VFR Spring
(Normal Position)
P
M
TInternal
Plug
Manual
Opening
Stem
VFR Spring
(Compressed)
Plug (Closed
Position)
Manual
Opening
Stem
Manual Opening Stem
ese valves are equipped with a
pressure driven manual opening
system versus the mechanical screw
thread mechanism. A small valve is
opened that allows the inlet pressure
trapped above the piston to escape
via passage (M), through the port
plug and into passage (T), the valve
outlet. Using a screw driver, turn the
CCW to manually open the valve.
Turn the stem CW to put the valve
back into automatic operation. If
the downstream pressure is more
than 0.35 bar (5psi) higher than the
inlet pressure the valve will not open.
ere is still a leak path between the
valve inlet and outlet through the
manual opening valve for pump down
purposes.
Installation
All gas powered suction stop valves
are packed for a maximum protection.
Unpack carefully. Check the carton
to make sure all items are unpacked.
Save the enclosed instruction for the
installer and eventual user.
Do not remove the protective
coverings from the inlet and outlet
of the regulator until the stop valve
is ready to be installed. Protect the
inside of the regulator from dirt and
chips before and during installation.
e valves should not be disassembled
before welding. is grade of stainless
steel is a poor conductor of heat and
conventional weld processes (stick,
MIG, and TIG) do not create enough
heat that transfers to the valve’s
internal parts that could be aected.
Contractors need to follow a WPS
(Welding Procedure Specication) for
all welding. e procedure must be
qualied and welder doing the weld
qualied to perform that procedure.
For welding the stainless steel 304L
body to carbon steel pipe, E309L and
ER309L-15,-16, or -17 ller metal

Page 4 / Bulletin 50-32
is a common choice. Contractors
can develop their own standards
and have them qualied based on
the equipment they use and the
environment they may encounter.
e codes applicable to the welding
of socket weld valves require that the
pipe be inserted into the socket until
bottomed against the stop. e pipe is
then to be backed out approximately
1/16 of an inch before welding. Use
of welding rings is optional, but
recommended for butt weld valves.
ey help alignment, control gap for
full penetration welding, and reduce
welding debris entry.
Note: When welding carbon steel
and stainless steel the welded joint
should be painted to prevent galvanic
corrosion.
Socket welding where allowed is the
preferred connection. is connection
does help to reduce the amount of
welding debris in the piping system.
Welded valves may be installed in
horizontal or vertical pipelines. In a
horizontal pipeline the valve can be
mounted 90 degrees to either side from
the upright position. ese valves can
not exceed below the 3-O’clock and
9-O’clock positions. It is important
that the valves are installed in the
correct direction of ow.
Before putting valves into service,
all pipe connections, valve seats,
and stem seals should be tested for
leaks at pressure levels called for in
appropriate codes.
Disassembly
(See also Bulletin RSBCV)
All CK-2W can be disassembled,
serviced and moving parts replaced
without disturbing the piping, but
of course, disassembly will cause
exposure of some section of piping
to atmosphere, which should be
addressed before disassembly
by evacuation and reclaim of the
refrigerant.
For the CK-2W series stop valve, the
high pressure supply line, passage
(P), should be removed prior to
disassembling the valve. e solenoid
coil (#2) should now be removed by
removing the coil clip (#1). Never
energize a solenoid coil that is not
mounted and secured on its solenoid
actuator (#3). e port plate, solenoid,
strainer, and pilot plug can remain
intact by removing the four bolts (#9).
e solenoid pseudo assembly (#3-7)
and the strainer (#12) can be replaced
with out the removal of the port plate.
Removal of the port plate may require
a sharp tap on their sides to unseat the
parts from their sealed position, for
which a rubber or rawhide hammer is
recommended so as to avoid damage
to the sealing surfaces. Removal of
the port plate will expose the top of
the piston. e piston spring (#30)
and piston (#29) should be removed
and inspected. Continue to inspect
the wear ring (#32), metal rings, and
gaskets.
Before re-assembly, all parts must
be cleaned with a suitable solvent,
permitted to dry, and lubricated with
a light lm of refrigerant oil, simply
wiped on with the ngers, All gaskets
and o-rings should be renewed, and
insertion and sealing will be facilitated
if a similar lm of oil is applied to them
as well.
Re-assembly is exactly the reverse
of disassembly, with the precaution
that the reliefs cut into each module
of the valve assembly and the
corresponding gaskets be aligned with
the appropriate location. Ensure that
all access ttings, solenoid features,
and bypass plug are sealed when
re-installing the corresponding parts.
Prior to installing the port plate inspect
the piston, using your hand, by pulling
up and pushing down. e piston
should move freely, without dragging
or hesitation. Adjust all torques
to the values indicated by torque
requirement table.
Tighten all bolts equally to draw the
assembly together evenly, to ensure
properly sealing of all joints.
Electrical
e Refrigerating Specialties Division
molded water resistant Class “H”
solenoid coil is designed for long
life and powerful opening force. e
standard coil housing meets NEMA
3R and 4 requirements. is sealed
construction can withstand direct
contact with moisture and ice. By def-
inition, Class “H” coil construction
will permit coil temperatures, as
measured by resistance method,
as high as 185°C. (366°F.) Final coil
temperatures are a function of both
uid and ambient temperatures. e
higher uid temperatures require
lower ambient temperatures for the
maximum coil temperature not to
be exceeded. Conversely, low uid
temperatures permit higher ambient
temperatures.
A solenoid coil should never be
energized except when mounted on its
corresponding solenoid tube.
e molded Class “H” coil is available
from stock with most standard
voltages. However, coils are available
for other voltages and frequencies, as
well as for direct current.
e solenoid coil must be connected
to electrical lines with volts and
Hertz same as stamped on coil. e
supply circuits must be properly
sized to give adequate voltage at the
coil leads even when other electrical
equipment is operating. e coil is
designed to operate with line voltage
from 85% to 110% of rated coil voltage.
Operating with a line voltage above or
below these limits may result in coil
burn-out. Also, operating with line
voltage below the limit will denitely
result in lowering the valve’s maximum
opening pressure dierential. Power
consumption during normal operation
will be 18.2 watts or less.
Caution
All personnel working on valves
must be qualied to work on
refrigeration systems. If there
are any question, contact
Refrigerating Specialties before
proceeding with the work.
Before doing any service work,
always be sure to disconnect
the power and isolate the valve.
Failure to do so will result in
venting of ammonia.
!

Bulletin 50-32 / Page 5
A
B
C
D
E
A
B
C
D
E
Dimension Port Size
50 mm (2”)
A 227.1 mm (8.94”)
B 16.0 mm (0.63”)
C 90.0 mm (3.54”)
D 249.7 mm (9.83”)
E 49.3 mm (1.94”)
CK-2W Butt Weld (BW) Dimensions
Dimension Port Size
50 mm (2”)
A 227.1 mm (8.94”)
B 16.0 mm (0.63”)
C 90.0 mm (3.54”)
D 249.7 mm (9.83”)
E 49.3 mm (1.94”)
CK-2W Socket Weld (SW) Dimensions

Page 6 / Bulletin 50-32
CK-2W Exploded Parts View
1
3
2
4
5
7
9
8
6
11
13
15
10
12
14
17
18
19
20
25
26
27
29
31
28
32
30
16 21
22
23
24
34
33

Bulletin 50-32 / Page 7
Item No. Description Material Qty
1 Clip, Coil S.S. 1
2 Coil ------- 1
3Solenoid Pseudo
Assembly S.S. 1
4 Armature, Coil S.S. 1
5 Spring, Coil S.S. 1
6 Seal, Coil Teon 1
7O-Ring, 0.813 ID x
0.938 OD x 0.062 Neoprene 1
8 Seat, Solenoid 303 S.S. 1
9 Bolt, M10 x 45MM
DIN-ISO
Standard
3506-1
4
10 Port Plate 6061-T6 Al 1
11 Nut, Retainer 0.750 RD 303 S.S. 1
12 Screen Assembly,
50 Mesh S.S.
13 O-Ring, 0.801 ID x
0.941 OD x 0.070 Neoprene 1
14 Seal Cap 6061-T6 Al 1
15 Nameplate, Sticker ------- 1
16 Pin, Roll 420 S.S. 1
17 O-Ring, 0.125 ID x
0.25 OD x 0.062 Neoprene 1
18 Stem, Manual Opening 303 S.S. 1
19 Nut, Retainer 416 S.S. 1
20 Plug Cap, Manual
Opening 7/16-20 6061-T6 Al 1
21 Washer, Flat 0.250 ID x
0.562 OD x 0.049 S.S. 1
22 Plug, Pilot 6061 Al 1
23 Spring, Pilot
Compression
17-7 PH Cond
CH 900 1
24 Seat, Pilot 303 S.S. 1
25 Gasket, Port Plate MP 15 1
26 Ring, Seal 2.528 ID
x 2.706 OD PTFE S.S. 1
27 Ring, Backing 302/304 S.S. 1
28 Ring, Retaining
2.174 Internal 302 S.S. 1
29 Piston 303 S.S. 1
30 Spring, Piston Music Wire
ASTM A-228 1
31 Ring, Seal Teon (PTFE) 1
32 Ring, Wear PTFE EMS-103 1
33 Body 304L S.S. 1
34 Flow Direction, Sticker ------- 2
CK-2W Parts List
Item No. Kit Description Port Size
50 mm (2”)
12 Screen, Strainer 208861
13 - 14 Seal Cap, Strainer 208773
8, 10 - 24 Port Plate 208774
17 - 20 Manual Opening Stem 208809
21 - 24 Pilot Plug 208775
25 - 32 Piston 208810
25 - 28,
31 - 32 Wear Seal, Piston 208821
7, 13, 17,
25 -28,
31 - 32
Gasket / O-Ring 208770
9 Bolt, Port Plate 208801
3 - 7 Solenoid Pseudo 208940
1 - 2 Coil, 120/60 or 110/50
18.5 Watt Leaded 204843
1 - 2 Coil, 240/60 or 220/50
18.5 Watt Leaded 204844
1 - 2 Coil, 208/60 18.5 Watt Leaded 204845
1 - 2 Coil, 240/50 18.5 Watt Leaded 204846
1 - 2 Coil, 24/60 18.5 Watt Leaded 206244
CK-2W Repair Kits

ISO 9001 CERTIFIED
© 2008 Parker Hannin Corporation
Safe Operation (See Bulletin RSBCV)
People doing any work on a refrigeration system must be
qualied and completely familiar with the system and the
Refrigerating Specialties Division valves involved, or all other
precautions will be meaningless. is includes reading and
understanding pertinent Refrigerating Specialties Division
Product Bulletins and Safety Bulletin RSB prior to installation
or servicing work.
Where cold refrigerant liquid lines are used, it is necessary
that certain precautions be taken to avoid damage which
could result from liquid expansion. Temperature increase in a
piping section full of solid liquid will cause high pressure due
to the expanding liquid which can possibly rupture a gasket,
pipe or valve. All hand valves isolating such sections should
be marked, warning against accidental closing, and must not
be closed until the liquid is removed. Check valves must never
be installed upstream of solenoid valves, or regulators with
electric shut-o, nor should hand valves upstream of solenoid
valves or downstream of check valves be closed until the
liquid has been removed.
It is advisable to properly install relief devices in any section
where liquid expansion could take place. Avoid all piping
or control arrangements which might produce thermal or
pressure shock.
For the protection of people and products, all refrigerant
must be removed from the section to be worked on before a
valve, strainer, or other device is opened or removed. Flanges
with ODS connections are not suitable for ammonia service.
Warranty
All Refrigerating Specialties products are under warranty
against defects in workmanship and materials for a period of
one year from date of shipment from factory. This warranty
is in force only when products are properly installed, field
assembled, maintained, and operated in use and service as
specifically stated in Refrigerating Specialties Catalogs or
Bulletins for normal refrigeration applications, unless other-
wise approved in writing by the Refrigerating Specialties
Division. Defective products, or parts thereof returned to the
factory with transportation charges prepaid and found to be
defective by factory inspection, will be replaced or repaired at
Refrigerating Specialties option, free of charge, F.O.B. factory.
Warranty does not cover products which have been altered,
or repaired in the field, damaged in transit, or have suffered
accidents, misuse, or abuse. Products disabled by dirt or other
foreign substances will not be considered defective.
e express warranty set forth above constitutes the only
warranty applicable to Refrigerating Specialties products, and
is in lieu of all other warranties, expressed or implied, written
including any warranty of merchantability, or tness for a
particular purpose. In no event is Refrigerating Specialties
responsible for any consequential damages of any nature what-
soever. No employee, agent, dealer or other person is authorized
to give any warranties on behalf of Refrigerating Specialties, nor
to assume, for Refrigerating Specialties, any other liability in
connection with any of its products.
312167 ECN: 8987 04/06/09
Replaces Prior Versions:
Symptom Probable Cause Correction
Failure to close Pilot solenoid is not opening Check voltage or solenoid coil burnout
Strainer may be plugged Remove and clean
Pilot pressure source is not high enough Must be 0.35 bar (5 psi) above the main valve
downstream pressure
Failure to open Opening spring may be broken Disassemble valve and replace spring
Pressure between remote pressure source
and main valve downstream pressures are not
equalizing
Check for leakage or backward installation of the
CK-2W
Leakage through
valve when closed
There are dirt or chips under the piston Disassemble valve and clean thoroughly
Wear ring may be warn Disassemble valve and replace wear ring
CK-2W Service Pointers
Location Description (SAE) Torque mkg (Ft-Lbs)
Port Plate Screws M10 x 45 MM (35)
Solenoid Pseudo
Assembly —Snug
Pilot Plug 3/4-16 UNF Snug
CK-2W Torque Requirement Table
Valve Port Size
50 mm (2”)
CK-2W 3.6 kg (8.0 lbs)
Socket Weld (SW) and Butt Weld (BW) Valve Weights