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Page 4 309679 ECN: 9285 06/07/10© 2010 Parker Hannifi n Corporation ISO 9001 CERTIFIED Safe Operation (See Bulletin RSBHV) People doing any work on a refrigeration system must be qualifi ed and completely familiar with the system and the Refrigerating Specialties Division valves involved, or all other precautions will be meaningless. Th 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-off , 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. Replaces Prior Versions: REL S H L W/2 L H (EX) S (EX) W/2 W/2 L S H W/2 L H (EX) S (EX) L FPT Globe “T” Valve FPT Connection - Standard and Extended Bonnet (EX) FPT EX Globe “T” Valve FPT Angle Valve FPT EX Angle Valve Valve Size W Globe “T”Angle LHS H (EX)S (EX)LHS H (EX)S (EX) 6 mm (1/4”) 63.5 mm (2.50”) 93.7 mm (3.69”) 114.3 mm (4.50”) 143.0 mm (5.63”)——44.5 mm (1.75”) 114.3 mm (4.50”) 143.0 mm (5.63”)—— 10 mm (3/8”) 63.5 mm (2.50”) 93.7 mm (3.69”) 114.3 mm (4.50”) 143.0 mm (5.63”)——44.5 mm (1.75”) 114.3 mm (4.50”) 143.0 mm (5.63”)—— 13 mm (1/2”) 63.5 mm (2.50”) 93.7 mm (3.69”) 114.3 mm (4.50”) 143.0 mm (5.63”) 184.2 mm (7.25”) 206.5 mm (8.13”) 44.5 mm (1.75”) 114.3 mm (4.50”) 143.0 mm (5.63”) 184.2 mm (7.25”) 206.5 mm (8.13”) 20 mm (3/4”) 108.0 mm (4.25”) 99.6 mm (3.92”) 152.4 mm (6.00”) 190.5 mm (7.50”) 215.9 mm (8.50”) 254.0 mm (10.0”) 52.4 mm (2.06”) 152.4 mm (6.00”) 190.5 mm (7.50”) 215.9 mm (8.50”) 254.0 mm (10.0”) 25 mm (1”) 108.0 mm (4.25”) 99.6 mm (3.92”) 152.4 mm (6.00”) 190.5 mm (7.50”) 215.9 mm (8.50”) 254.0 mm (10.0”) 52.4 mm (2.06”) 152.4 mm (6.00”) 190.5 mm (7.50”) 215.9 mm (8.50”) 254.0 mm (10.0”) FPT Valve Dimension Table for Standard and Extended (EX) Bonnets Installation Screwed End Th e most important factor other than the valve itself in achieving a leak-tight and secure threaded valve installation is selection and preparation of mating piping. Pipe 1-1/2” and smaller should be Schedule 80 Steel ASTM A-106 Grade B or equal, properly cut to correct length and cleanly and properly threaded with U.S. National Tapered Male Pipe Th reads. Th e male thread sealant is recommended. Sealant should be applied evenly to act as a lubricant between the threads to avoid any chance of metal-to-metal galling. Valve and piping should be adequately tightened with two wrenches positioned as close together as possible, but not touching the pipe threads. In horizontal piping of suction, overfeed gas return, or condenser drain lines, globe valve or angle valve stems should be horizontal to avoid liquid trapping of gas fl ow at the valve body casting seat orifi ce. Before putting valves into service, all pipe connections, valve seats, bonnet seals, and stem seals should be tested for leaks at pressure levels called for in appropriate codes. Socket and Butt Weld Welding valves may be installed in horizontal or vertical pipelines. Stems may be horizontal, vertical, or angled upward. Globe valves in horizontal suction lines or liquid overfeed return lines, condenser drain lines, purge lines, oil pot drain lines, and level control column isolation valves should preferably have stems horizontal, rather than upward, to avoid liquid or gas trapping at valve seat orifi ces. Inlet pressure for all valve sizes should normally be under seat valve disc, although not required. Th e valve stem should be open during welding. Normally, it is not necessary to disassemble valves for welding. However, if welding is prolonged enough to overheat the body, a wet rag should be wrapped around the valve bonnet and upper body during welding. Th e codes applicable to the welding of socket weld valves require that the pipe be inserted into the socket until bottomed against the stop. Th 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. Th ey help alignment, control gap for full penetration welding, and reduce welding debris entry. Welds should be annealed as necessary in accordance with good practice. Painting of valves and welds is recommended for corrosion protection. Pipe covering where applied, should have proper moisture barrier. Shut-off valves leading to atmosphere, even if it is temporary, must be plugged or capped to prevent corrosion inside of the valve as well as leakage due to vibration, pressure shock, or improper opening; the valve seat should be cracked open to prevent hydrostatic expansion between the valve and the cap. Valves should never directly feed a water tank because of potential internal corrosion or seat opening caused by vibration. Before putting valves into service, all pipe connections, valve seats, bonnet seats, and stem seals should be tested for leaks at pressure levels called for in appropriate codes.