4
C401e
JUL 2006
Hansen Technologies Corporation
400 Quadrangle Drive, Suite F
Bolingbrook, Illinois 60440 USA
Tel: 630.325.1565 Fax: 630.325.1572 Toll: 866.4HANSEN
Email: [email protected] Web: www.hantech.com
USA ∙ Asia ∙ Europe ∙ India ∙ Latin America ∙ Middle East
© 2006 Hansen Technologies Corporation
OPERATION
HCK4 check valves are normally closed valves. As
inlet pressure increases, it overcomes the closing
spring force. As the seat disc is pushed back and away
from the seat cartridge, flow through the valve occurs.
The valve will remain open until the inlet pressure
drops below the closing spring force or there is a flow
reversal, at which time the seat disc will close against
the seat cartridge, preventing reverse flow.
SIZING
Check valves are normally selected on the basis of line
size. However, for gas flow applications at low load
conditions, a minimum of 1 psid across the valve is
essential. This will maintain valve at full open position.
Valve Cv (Kv) is listed in the installation dimension
table on page 2. Factory valve sizing assistance is
available.
SERVICE AND MAINTENANCE
These valves are a reliable part of a refrigeration
system. However, if valve does not appear to be
operating satisfactorily, isolate it from the refrigeration
system. Remove all refrigerant from associated piping
and valves. Follow the guidelines in the caution section.
Loosen each flange nut on the check valve. Break
each flange gasket seal. Carefully loosen flange bolts
one at a time, being cautious to avoid any refrigerant
which still may be present. Remove check valve from
flanges and inspect. Lapped seating surfaces should
be smooth and free of pits or scratches.
To confirm valve operation, move seat disc with eraser
end of pencil. Movement should be free from friction.
If not, disassemble and visually inspect for dirt in
valve or burrs on seat disc. Clean or replace parts
as necessary. Valve discs and seats can be restored
by lapping on a flat plate.
Reassemble valve and insert between flanges. Replace
and tighten bolts and nuts evenly. Carefully check
for leaks before returning to service.
CAUTION
Hansen check valves are only for refrigeration systems.
These instructions and related safety precautions must
be completely read and understood before selecting,
using, or servicing these valves. Only knowledgeable,
trained refrigeration mechanics should install, operate,
or service these valves. Stated temperature and
pressure limits should not be exceeded. Valves should
not be removed unless system has been evacuated
to zero pressure. See also Safety Precautions in
current List Price Bulletin and Safety Precautions
Sheet supplied with product. Escaping refrigerant
might cause personal injury, particularly to the eyes
and lungs.
WARRANTY
A ll Hansen products, except electronics, are
guaranteed against defective materials or workmanship
for one year F.O.B. factory. Electronics are guaranteed
against defective materials or workmanship for 90
days F.O.B. factory. No consequential damages or
field labor is included.
ORDERING INFORMATION
TYPE
PORT SIZE
INCHES (mm)
FLANGE CONNECTION
STYLE & SIZES
FPT, SW, WN
ODS
STD
ALSO
STD
HCK4-2
5/8” (16)
1/2”
3/8”, 3/4”
5/8”
HCK4-3
3/4” (20)
3/4”
1”, 1-1/4”
7/8”
HCK4-4
1” (25)
1”
3/4”, 1-1/4”
1-1/8”
HCK4-5
1-1/4” (32)
1-1/4”
3/4”, 1”
1-3/8”
HCK4-7
1-1/2” (40)
1-1/2”
2”
1-5/8”
HCK4-8
2” (50)
2”
1-1/2”
2-1/8”
HCK4-9
2-1/2” (65)
2-1/2”
3”
2-5/8”
HCK4-0
3” (80)
3”
–
3-1/8”
HCK4-1
4” (100)
4”
–
4-1/8”
HCK4-2 close-couples to HS6 & HS8 Solenoid Valves.
HCK4-3, -4, & -5 close-couples to HS7 Solenoid Valve.
FPT available only 3/8” to 1¼”.
TO ORDER: Specify valve type, connection style and
size, and close-coupling information if needed.
TYPICAL SPECIFICATIONS
“Refrigeration in-line check valves shall have steel
or ductile iron bodies, stainless steel seat discs,
stainless steel closing springs, and be suitable for a
safe working pressure of 400 psig, as manufactured
by Hansen Technologies Corporation type HCK4 or
approved equal.”
HCK4
ADAPTER RING
TYPICAL CLOSE-COUPLING TO SOLENOID VALVE
