HANSEN TECHNOLOGIES HANSEN TECHNOLOGIES

HCK2 PARTS LIST 1¼" through 4" (32 mm through 100 mm)5

HCK2W PARTS LIST, 5" & 6" (125 mm & 150 mm)ITEMDESCRIPTIONQTYPART NOWELD END DIMENSIONS 5" & 6"PORT SIZE A T5"(125 mm)6"(150 mm)5.05"(128 mm)6.06"(154 mm)0.26"(6.6 mm)0.28"(7.1 mm)1a1b23456789101112131415a15b1617181920212223Piston/Seat 5"Piston/Seat 6"SpringCover O-Ring, inner, 5" & 6"Cover O-Ring, outer, 5" & 6"Back-up WasherStem Seal O-RingStem WasherPackingPacking NutSeal Cap GasketStemSeal CapCoverCover BoltsBody 5"Body 6"Piston SealNipple( 3/4"x 6" )Disc Strainer Screen AssemblyDisc Strainer Flange GasketFlange BoltFlange NutFlange3/4"FPTFlange1/2"FPT (Standard)SW, WN, ODS Available111111111111114111112221175-068675-060875-060075-060575-060650-032450-029350-029950-029050-029250-031575-058450-030475-058375-060475-063875-063975-060275-068078-004970-006570-005470-005570-002470-00236

SERVICE AND MAINTENANCEFailure to close: The pilot solenoid valve is notopening due to an electrical problem. Disc straineror high pressure pilot line may be plugged. Pilotpressure source is not high enough; it must be atleast 10 psi (0.7 bar) above pressure through mainvalve. Manual opening stem is turned in. Dirt maybe lodged between the piston/seat and valve pistonwall.Failure to open: The pilot solenoid valve is jammedopen with dirt. Pilot solenoid valve manual openingstem is turned in. Pilot pressure and pressurethrough main valve are not equalizing. Check forreverse installation of main valve preventing pressureabove piston/seat from bleeding down to outlet ofmain valve. Dirt may be lodged between piston/seat and valve piston wall. The opening springmay be damaged or broken.Manual operation: If it is necessary to manuallyhold open the HCK2 valve, cautiously remove theseal cap and turn the manual opening stem inward(clockwise) as far as possible. The piston/seatshould now be mechanically held open, and valvewill not close until the manual opening stem isturned out (counter-clockwise). Do not operate theHCK2 automatically when the manual opening stemis turned in or else stem may break after repeatedcycles.Loss of power: If the HCK2 pilot solenoid is deenergized,the HCK2 will open. If this must beavoided during mid-defrost of large evaporators,merely use a normally open pilot solenoid valve.As an alternate, a unique HCK5 model is availablewhich stays closed until the system pressureequalizes if the pilot solenoid loses electric supply.Disassembly: If it is necessary to remove ordisassemble valve for servicing, be sure the highpressure pilot line and main valve are completelyisolated from the refrigeration system and all refrigerantis removed (pumped out to zero pressure).Be sure to follow refrigeration system safe procedures.Disconnect pilot line, clean or replace discstrainer/orifice assembly as necessary.To inspect valve interior, after removing pressure,slowly loosen the cover bolts equally (or screwedcover of 1¼" HCK2) and break gasket seal, beingcareful to avoid any refrigerant which may stillremain. Remove cover bolts and cover. Removepiston/seat. If necessary, a cover bolt can be screwedinto center of piston/seat to lift it from valve body;use 3 /8"-16 bolt for 1¼" piston/seat. Clean andinspect for burrs and damage to seating surfaces.Slight marks and burrs can often be removed withemery paper by hand or power lapping. Damagedparts should be replaced. When replacing piston/seat in field, for maximum valve tightness it isadvisable to lap the seat into the valve body. Lightlylubricate main valve interior bore with refrigerantoil and install spring and piston/seat. Manuallysimulate valve operation by pushing on top of piston/seat. Action should be smooth and spring shouldreadily push piston/seat back; if not, polish thebore and piston with emery cloth and check thespring for position and integrity. Re-assemble cover,gasket and bolts, pilot line and disc strainer.Carefully check the entire valve for leaks beforerestoring the valve to service.Opening shock (at the conclusion of defrost): Tominimize this sudden drop in pressure and possibleevaporator exit slugs of liquid, bleed down evaporatorpressure with a small equalize solenoid (bypass)valve before de-energizing the pilot solenoid valveto open the HCK2, see below. Alternately use thelowest possible defrost pressure by properly settingthe defrost relief regulator and controlling incominghigh pressure gas (hot gas).7

CAUTIONHansen valves are only for refrigeration systems.These instructions and related safety precautionsmust be completely read and understood beforeselecting, using, or servicing these valves. Onlyknowledgeable, trained refrigeration mechanicsshould install, operate, or service these valves.Stated temperature and pressure limits should notbe exceeded. Valve cover or pilot line should notbe removed from valves unless system has beenevacuated to zero pressure. See also SafetyPrecautions in current List Price Bulletin and SafetyPrecautions Sheet supplied with product. Escapingrefrigerant might cause personal injury, particularlyto the eyes and lungs.WARRANTYHansen valves are guaranteed against defectivematerials or workmanship for one year F.O.B. ourplant. No consequential damages or field labor isincluded.TYPICAL APPLICATIONFROM HIGHPRESSURE GASSOURCEPILOT SOLENOID VALVEDEFROST CONTROLControl of the entire defrost process of large, lowtemperature evaporators, including those using HCK2Gas-Powered Suction Stop Valves is ideallyaccomplished by the use of a Hansen Frost Master ®or Frost Master ® Plus Defrost Controller. In general,the Frost Master ® is able to reduce the amount ofcold liquid in the coil at the start of defrost, reducethe initial shock of hot gas entry (soft gas), efficientlyterminate hot gas stage and to permit the evaporatorto return to low pressure with minimum shock tothe system and its piping and evaporator.Frost Master ® PlusTeflon ® is a registered trademark of DuPont© 1999 Hansen Technologies Corporation Printed in USASUCTION(OTHER POSITIONS, VERTICAL PIPE ORPILOT ON TOP POSSIBLE)FROM EVAPORATOR TO COMPRESSOR8ORDERING INFORMATIONPORTSIZE(mm)FLANGE CONNECTION STYLES & SIZESTDSW,WN, FPTALSOODSSTD1 1 /4" ( 32)1 1 /4" 1",/4" 1 3 /8"1 1 /2" ( 40)1 1 /2" 2"1 5 /8"2 " ( 50)2"1 1 /2" 2 1 /8"2 1 /2" ( 65)2 1 /2" 3 2 5 /8"3 " ( 80)3"⎯ 3 1 /8"4 " ( 100)4"⎯ 4 1 /8"5 " * ( 125)5"BW⎯ ⎯6 " * ( 150)6"BW⎯ ⎯* 5" & 6" are integral butt weld only, Type HCK2W.TO ORDER: Specify type HCK2, port size, flangeconnection style and size, and pilot solenoid valveif desired. For pilot solenoid valve: specify HS6for 2" and smaller HCK2, or HS8 for 2½" and larger;connection style and size: ½" FPT standard, SW orWN available; voltages: 115V, 230V, 24V; 50/60Hz.Unless otherwise specified standard coil with ½"fitting for conduit will be supplied with pilot valve.Also available, DIN plug coil for grounded cordconnection or coil with junction box.TYPICAL SPECIFICATIONS“Gas-powered suction stop valves shall be normallyopen, remote pilot pressure operated, with manualopening stem, pilot line disc strainer and suitablefor a safe working pressure of 400 PSIG (27 bar),as manufactured by Hansen TechnologiesCorporation or approved equal.”OTHER PRODUCTSAmmonia Pressure-Relief ValvesRupture Disc AssembliesGauge, Purge, and Needle ValvesShut-off ValvesExpansion Valves (Regulators)Refrigerant Solenoid ValvesRefrigerant Pressure RegulatorsSmall Pressure RegulatorsRefrigerant Check ValvesStrainersGas-Powered ValvesRefrigerant Float SwitchesFloat Regulators (High Side)Refrigerant Liquid PumpsAUTO-PURGER ® Non-condensible Gas PurgerVari-Level ® Adjustable Level ControlsTechni-Level ® Transducer ProbesFrost Master ® Defrost ControllersSEE-LEVEL ® Refrigerant Liquid IndicatorsHANSEN TECHNOLOGIESCORPORATION6827 High Grove BoulevardBurr Ridge, Illinois 60521 U.S.A.Telephone: (630) 325-1565Toll-free: 1-800-426-7368FAX: (630) 325-1572E-mail: info@hantech.comWeb Site: www.hantech.com