Products / Parker / Refrigeration and Air Conditioning / RS- Hand Shut- Off/ Expansion Valves
The RS Shut- off/ Expansion Valves were designed and built to maintain reliability both in their seating and back seating functions.
The complete Industrial Refrigeration line of
Hand Shut-Off and Expansion Valves with bolt-on bonnets are designed
and built to maintain reliability both in their seating and back
seating functions. This entire line is supplied with stainless steel
stems for maximum corrosion resistance and back seating capability.
A unique carbon filled PTFE seat is standard throughout the line,
lending durability to the seating surface. In addition, a dual
O-ring stem packing design along with a stem packing seal is
standard on all valves 1⁄4” thru 12” (Shut- Off) and ¼” thru 2”
(Expansion). This innovative design seals both the valve stem and
bonnet bore with independent O-rings, which are captured in a carbon
PTFE carrier. The addition of the packing provides for backup
sealing capability in the unlikely event of an O-ring failure. A
packing nut design with either 1⁄4” or 5⁄16” flats provides a
generous wrench engagement area, with little likelihood of
“rounding” the flats. With the O-ring cartridge used in all valve
bonnets, there will typically be no need to loosen the packing nut
when opening or closing a valve. In most cases, stem resistance will
be negligible, allowing the valve to be easily repositioned.
The extended bonnet is available for globe style valves in the Tee
body configuration and in angle style bodies. Valves are available
with either hand wheel or seal cap. These caps are exclusive to this
series of valves and should not be exchanged with seal caps from
other R/S service valves.
Markets:
• Industrial Refrigeration
• Commercial Refrigeration
Hand Shut- Off Valve Features and Benefits:
• ASTM 352 LCB Cast Steel Body 6 – 300 mm (1⁄4” - 12”)
• Fluid Temperature Range: -50° C to 204° C (-60° F to 400° F)
• Type 303 Stainless Steel Stem and packing nut; 304 Stainless Steel
Bolts
• Reliable Back Seating
• Complete Line of Bolted Bonnets
• 25% Carbon Filled PTFE Seat
• Linear flow “Y” Pattern Globe
• Bodies (11⁄4” - 12”) for Low Pressure Drop
• Extended Bonnets for Insulation
• Hand wheel and Seal Cap Interchangeable on Same Valve
Hand Expansion Valve Features and Benefits:
• ASTM 352 LCB Cast Steel Body (1/4” thru 2”)
• Maximum Safe Working Pressure 400 PSIG
• Fluid Temperature Range: -50°F to +300°F
• 300 Series Stainless Steel Stem
• 300 Series Stainless Packing Nut
• Optional Stainless Steel Bonnet Bolts
• Reliable Back Seating
• Bolted Bonnets
• 25% Carbon Filled PTFE Seat (1/4” thru 2”)
• Available Connections:
o 1/4” thru 1-1/2”, Screwed End
o 1/4” thru 2”, Socket Weld
o 1-1/4” thru 2”, Butt Weld
• Globe Body - Tee and Angle Styles
• Extended Bonnets For Thicker Insulation Optional
Application:
• Ammonia
• Fluorocarbons
• Nitrogen
• Carbon Dioxide