HANSEN CORPORATION TECHNOLOGIES Specifications, Applications, Service Instructions & Parts HCK, HCKW PISTON-TYPE CHECK VALVE ¾" thru 6" (0 thru 50 mm) Flanged ¾" thru " FPT, SW, WN, ODS for refrigerants Piston-Type Check Valve: " HCK ISO 900 Hansen Technologies Corp. Burr Ridge, IL Cert. # 0007 Orlando, FL Cert. # 0053 INTRODUCTION These flanged, heavy-duty, piston-type check valves control the flow of refrigerant. Valves open wide for flow in the direction of the arrow on the valve body. Valves close tight when flow reversals occur. The piston design minimizes pulsations. Valves open when inlet pressure exceeds outlet pressure ( psid [.07 bar] minimum), thereby lifting the piston/seat assembly and allowing flow through the valve. When inlet pressure and outlet pressure are equalized, the weight of the piston/seat assembly causes the valve to close. If outlet pressure exceeds inlet pressure, the outlet pressure acting on top of the piston/seat also helps seat the valve closed. Also available, Type HCK in-line check valves and Type SCK combination stop/check valves; contact Hansen KEY FEATURES ADVANTAGES This normally closed valve requires very little pressure drop to operate. Valve sizes ¾" thru ¼" have spring-assisted closing. Valve sizes ½" thru 6" have a special, spool-type, dirt-resistant piston/ seat. A manual opening stem allows positive opening during servicing or troubleshooting the system. The flange-to-flange dimension and flange pattern are the same as the Parker R/S allowing this valve to be dropped in without main line piping changes (exception: ¼"). APPLICATIONS The HCK piston-type check valve prevents reverse flow of refrigerant in liquid, discharge, suction, and hot gas lines. It is an ideal valve where constant pulsating of gas or liquid is present, or where a manual opening of the valve is desirable. This valve is suitable for ammonia, R, R3a, and other common refrigerants.
MATERIAL SPECIFICATIONS Body: ¾" thru ": Ductile iron ASTM A536 65,000 psi tensile (nodular iron GGG-0) 5" & 6": Cast steel Piston/Seat: ¾" thru ¼": Stainless steel with Teflon seat ½" thru 6": Ductile iron, ASTM A536 Closing Spring: Stainless steel (¾" thru ¼" only) Gaskets: Nonasbestos, graphite composite Stem: Plated steel Cover: Steel Stem Seal: O-ring plus graphite composite packing Companion Flanges: Forged steel Safe Working Pressure: 00 psig (7 bar) Operating Temperature: 5F to +50F ( 3 to + C) INSTALLATION Protect the interior of the valve from dirt and moisture during storage and installation. The valve must be installed upright in a horizontal line. The arrow on the valve body should be in the normal direction of refrigerant flow. The system should be free of dirt, weld slag, and rust particles. Install the valve in an accessible location for servicing. Do not install a check valve at the inlet of a solenoid valve or regulator with electric shut-off. Do not install a check valve at the inlet of an outlet regulator where liquid may be trapped between the valves. Check valves in general, when installed, should be at the outlet of control valves to avoid trapping refrigerant between the valves. SIZING The same care should be taken when sizing check valves as with any other type of control valve. Check valves should be sized so that the valve is fully open under all normal operating conditions. Also, the check valve port size is not always the same as the line size. This is particularly true for gas flow in compressor discharge lines and hot gas lines. Under some conditions, the port size of a properly-selected check valve can be one or two sizes smaller than the line. The pressure drop across the HCK check valve should normally be to 5 psi under full load conditions. In addition, the pressure drop across the check valve at normal minimum load should be determined. For the Hansen HCK check valve, a minimum of psi at minimum load is required to ensure that the valve is fully open during all normal flow conditions. CAPACITIES (Tons) ( Ton=,000 Btu/hr= 3.57 kw= 30 kcal/hr) REFRIG. R77 R APPLICATIONS DESCRIPTION Discharge Line Compressor Sideport Liquid Line Discharge Line Compressor Sideport Liquid Line Cv (Kv) P ¾" (3) " (3) ¼" (3) ½" (0) PORT SIZE (mm) " (50) ½" (65) 3" (0) " (00) 5" (5) 6" (50) psi 9 50 33 750 95 5 psi 3 5 69 00 3 37 535 73 7 9 psi 6 5 7 36 93 -- -- -- 5 psi 9 5 3 0 9 09 96 -- -- -- TONS psi 09 7 5 7 35 3 39 703 -- -- GPM psi 9 3 97 57 6 -- -- psi 7.5 9. 5 5 3 59 3 5 psi 6 70 33 9 55 675 psi.7 6. 9.6 7 3 5 7 -- -- -- 5 psi 7. 9.5 5 50 0 -- -- -- TONS psi 63 97 330 53 756 656 -- -- GPM psi 9.9 3 0 5 6 0 56 3 -- -- (7) 0.5 (9) 6.3 () 7 (0) 55 (7) psi = 0. bar 5 psi = 0.35 bar U.S. GPM (gallons per minute) = 0.7 m 3 /hr 9 (76) 6 (0) 76 (36) 350 (300) Discharge line capacities based on +6F (+30 C) condenser, +0F (+60 C) discharge, and +5F ( 9. C) evaporator. Compressor sideport capacities based on +0F ( 6.7 C) economizer and +6F (+30 C) condensing. 50 (35) Liquid line capacities based on +0F ( 6.7 C) liquid and +5F ( 5 C) evaporator, with no flashing through valve. To convert to +6F (+30 C) liquid, multiply values in table by 0.9. To convert R capacities to R3a, multiply tons in table by 0.9 (accuracy within %). GPM correction factors for temperatures between 0F ( 0 C) and +0F (+. C) are negligible.
TYPICAL APPLICATIONS DISCHARGE LINE COMPRESSOR SIDEPORT INTERMEDIATE PRESSURE GAS TO COMPRESSOR SUCTION HCK PISTON-TYPE CHECK VALVE ECONOMIZER COOLER PUMP DISCHARGE LINE TRANSFER SYSTEM PUMP ACCUMULATOR VENT/BYPASS LINE LIQUID RELIEF HCK PISTON-TYPE CHECK VALVE The above are schematic drawings of fictional refrigeration systems to show Hansen product applications in a system. These drawings should not be used for design or construction. 3
INSTALLATION DIMENSIONS ¾" thru " (0 mm thru 00 mm) 5" & 6" (5 mm & 50 mm) 0.0" (5 mm) PORT SIZE (mm) ¾", " (0), (5) ¼" (3) ½", " (0), (50) ½" (65) 3" (0) " (00) 5" (5) 6" (50) HCK Flange-to-flange dimensions (L) are the same as the Parker R/S Type CK, except ¼", 5", and 6". L H H FPT, SW." (07)." (07) 7." ().06" (05).3" (3) 9." (5).3" (30).3" (30).30" (0).30" (0) 5.3" (36) 6.0" (55) 6.56" (67) 7.3" (7).3" (36).3" (36).0" (0).0" (0).39" (35) 3.0" (330) 5.3" (39) 7.0" (3) DIMENSIONS (mm) WN, ODS.9" (7).9" (7) 3.39" (30).03" (356) 6.0" (7) 0.5" (5) L * L W ** 6.9" (57) 6.9" (57) 9." (5) 9." (5).5" (3)." (359) 7.0" (3) 7.0" (3) 0.9" (77).0" (0) 3.3" (30) 5.0" (3) -- -- -- -- -- -- -- -- *L is the flange face-to-face dimension. **W dimension is the maximum width of the valve..50" ().50" ().50" () 5.6" (3) 6.50" (65).06" (05).75" (3).75" (3)
HCK PARTS LIST, ¾" thru ¼" (0 mm thru 3 mm) ITEM DESCRIPTION QTY PART NO. a b 3 Piston/Seat Kit ¾", " Piston/Seat Kit ¼" Above kits consist of: xxpiston/seat ¾", " xxpiston/seat ¼" xxclosing Spring xxcover O-ring, Lower xxcover O-ring, Upper 70-09 70-0 70-063 70-067 70-055 70-030 70-03 3 5 6 7 9 Gasket Kit ¾", ", ¼" Above kit consists of: xxcover O-ring, Lower xxcover O-ring, Upper xxstem O-ring xxstem Washer xxpacking xxpacking Nut xxseal Cap O-ring xxflange Gasket 70-07 70-030 70-03 70-000 70-006 70-005 70-009 70-00 70-03 9 0 xxseal Cap xxseal Cap O-ring xxstem 50-0 70-00 70-0 3a 3b 5 6 7 Cover Body ¾", " Body ¼" Flange (various) Bolt ( 5 /"- x 3 /") Nut ( 5 /"-) 70-0307 70-0369 70-0369 FACTORY 70-0339 70-036 5
HCK PARTS LIST, ½" thru " (0 mm thru 00 mm) ITEM DESCRIPTION QTY PART NO. a b c a b c a b c 3a 3b a b 5a 5b 6a 6b 7a 7b a b a b c d Piston/Seat Kit ½", " Piston/Seat Kit ½" Piston/Seat Kit 3" Piston/Seat Kit " Above kits consist of: xxpiston/seat ½", " xxpiston/seat ½", 3" xxpiston/seat " xxcover Gasket ½", " xxcover Gasket ½", 3" xxcover Gasket " Gasket Kit ½", " Gasket Kit ½" Gasket Kit 3" Gasket Kit " Above kits consist of: xxcover Gasket ½", " xxcover Gasket ½", 3" xxcover Gasket " xxback-up Washer ½", ", ½", 3" xxback-up Washer " xxstem O-ring ½", ", ½", 3" xxstem O-ring " xxstem Washer ½", ", ½", 3" xxstem Washer " xxpacking ½", ", ½", 3" xxpacking " xxpacking Nut ½", ", ½", 3" xxpacking Nut " xxseal Cap O-ring ½", ", ½", 3" xxseal Cap Gasket " xxflange Gasket ½ ", " xxflange Gasket ½ " xxflange Gasket 3" xxflange Gasket " 75-00 75-005 75-006 75-0 75-0 75-0 75-0 75-096 75-0 75-03 75-007 75-00 75-009 75-07 75-096 75-0 75-03 75-05 50-035 50-079 50-053 50-006 50-07 50-005 50-0 50-003 50-05 50-03 50-070 75-03 75-05 75-037 75-053 ITEM DESCRIPTION QTY PART NO. 9a 9b 9c 0a 0b a b c a b c 3a 3b 3c 3d 3e 5 6a 6b 6c 7a 7b 7c Stem ½", ", ½" Stem 3" Stem " Seal Cap ½", ", ½", 3" Seal Cap " Cover ½", " Cover ½", 3" Cover " Cover Bolts ½", " Cover Bolts ½", 3" Cover Bolts " Body ½" Body " Body ½" Body 3" Body " Flange (various) Flange Bolt ½", "( 5 /"- x 3 /") Flange Bolt ½", 3"(¾"-0 x 3¾") Flange Bolt "( 7 /"-9 x ") Flange Nut ½", "( 5 /"-) Flange Nut ½", 3" (¾"-0) Flange Nut "( 7 /"-9) 75-0 75-035 75-0 75-039 50-060 75-007 75-0 75-03 75-075 65-0057 75-09 75-097 75-097 75-0 75-09 75-03 FACTORY 70-035 75-00 75-079 70-036 75-00 75-00 6
HCKW PARTS LIST, 5" & 6" (5 mm & 50 mm) ITEM DESCRIPTION QTY PART NO a b 3 5 6 7 9 0 3 a b xpiston/seat 5" xpiston/seat 6" xcover O-ring, Inner, 5" & 6" xcover O-ring, Outer, 5" & 6" xback-up Washer xstem Seal O-ring xstem Washer xpacking xpacking Nut xseal Cap Gasket xstem xseal Cap xcover xcover Bolts xbody 5" xbody 6" 7 75-066 75-060 75-0605 75-0606 50-03 50-093 50-099 50-090 50-09 50-035 75-05 50-030 75-053 75-060 75-063 75-0639
SERVICE AND MAINTENANCE Failure to Close: The manual opening stem is turned in, mechanically holding the piston/seat open. Dirt may be lodged between the piston/seat and the valve piston wall. Failure to Open: The pressure difference is not high enough. Inlet pressure must be at least psi above outlet pressure. Adjacent shut-off valves or control valves are not open. Dirt may be lodged between the piston/seat and valve piston wall. Manual Operation: If it is necessary to manually hold open the HCK valve, remove the seal cap cautiously. There may be a small amount of refrigerant trapped in it. Turn the manual opening stem inward (clockwise) as far as possible. The piston/seat is then mechanically held open. The valve cannot close until the manual opening stem is turned out (counter-clockwise). If it is necessary to remove or disassemble the valve for servicing, be sure it is completely isolated from the refrigeration system and all refrigerant is removed (pumped out to zero pressure). Be sure to follow refrigeration system safety procedures and read the Caution section in this bulletin. To inspect valve interior, slowly loosen the screwed cover or four cover bolts equally, being careful to avoid any refrigerant which may still remain. Remove the piston/ seat. Then clean and inspect for burrs and damage to the seating surfaces. Slight marks and burrs can often be removed by hand with emery paper or by power lapping. Damaged parts should be replaced. Lightly lubricate the main valve interior bore with refrigerant oil, and install the piston/seat and closing spring (a closing spring is used in ¾" - ¼" valves only). Replace the cover, gasket and bolts (½" - 6"). Carefully check the entire valve for leaks before restoring the valve to service. CAUTION Hansen 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. The valve cover or pilot line should not be removed from valves unless the system has been evacuated to zero pressure. See also Safety Precautions in the current List Price Bulletin and the Safety Precautions Sheet supplied with the product. Escaping refrigerant might cause injury, particularly to the eyes and lungs. ORDERING INFORMATION, PISTON-TYPE CHECK VALVES PORT SIZE (mm) FLANGE STYLE AND SIZES CONNECTIONS AVAILABLE SW, WN, FPT ODS STD ALSO STD ¾"x(0) ¾" ", ¼" 7 /" "x(5) " ¾", ¼" /" ¼"x(3) * ¼" ", ¾" 3 /" ½"x(0) ½" " 5 /" "x(50) " ½" /" ½"x(65) ½" 3" 5 /" 3"x(0) 3" -- 3 /" "x(00) " -- /" 5"x(5) ** 5" BW -- -- 6"x(50) ** 6" BW -- -- * ¾", ", and ¼" valves are -bolt design. **5" & 6" are integral butt weld only, Type HCKW. To Order: Specify Type HCK (or HCKW), port size, flange connection style and size. TYPICAL SPECIFICATIONS Piston-type check valves shall be ductile iron or steel bodied, normally closed, with a manual opening stem, as manufactured by Hansen Technologies Corporation or approved equal. OTHER PRODUCTS Ammonia Pressure-Relief Valves Gauge, Purge, and Needle Valves Shut-off Valves Expansion Valves (Regulators) Refrigerant Solenoid Valves Refrigerant Pressure Regulators Small Pressure Regulators Refrigerant Check Valves Strainers Gas-Powered Valves Refrigerant Float Switches Float Regulators (High Side) Refrigerant Liquid Pumps AUTO-PURGER Non-condensable Gas Purgers Vari-Level Adjustable Level Controls Techni-Level Transducer Probes Frost Master Defrost Controllers SEE-LEVEL Refrigerant Liquid Indicators WARRANTY Hansen valves are guaranteed against defective materials or workmanship for one year F.O.B. factory. No consequential damages or field labor is included.