PROCESS CONTROL VALVES
MODEL 521
Body sizes:
1/2”, 1”, 1-1/2”, 2”
The Model 521 Globe-Style Control Valve with sliding stem, bellows sealed, pneumatically actuated valves designed to achieve the ultimate in long-term corrosive chemical service. Our exclusive unibody forged-TFE construction is unique in the industry and can handle even absolute vacuum applications. The one-piece body is machined from a solid block of isostatically compacted virgin TFE and encased in a cast 304 SST body shell to prevent distortion. Construction includes a 100,000-cycle TFE bellows, quick change trim, replaceable plug, and dual stem seal design to minimize emissions. This valve can handle strong acids and bases, most organics and industrial reagents.
Maximum Cv:
From 0.10 to 40
The Model 521 with dense TFE walls is capable of vacuum service, with max corrosion protection while minimizing permeation.
Materials:
Isostatically compacted TFE in SST body shell
End connections:
150# and 300# Flanged
Temperature range: 0° F to +310° F, 0 °C to +154 °C Pressure drop:
MODEL 521 (GLOBE-STYLE)
Up to 275 psid, (19 bard)
Seat leakage: Class VI
MODEL THE PREMIER This valve was born to throttle. The Premier EZO (short for easy opening) has superb throttling characteristics and is designed to eliminate “popoff” flow surges. It is available in a lined version or unlined in three body materials and five sizes from 3” to 10”. The Premier uses the same multi-spring return actuator as the Ranger QCT and has a square-shaft stem coupling that’s easy to adapt to your favorite actuator. This valve has a butterfly design for demanding throttling service. MODEL 987 The Model 987 precision globe-style “chemical valve” is the valve of choice to handle hostile fluids and environments – as well as steam and water. Its corrosion-resistant, field-reversible actuator, alloy body and trim materials, high pressure-drop capability, and exceptionally low Cv rangeability make the Model 987 one of the most reliable and versatile valves in the chemical process industry. This valve is for exceptional low Cv rangeability plus high pressure capability.
Body sizes:
End connections:
Seat leakage:
3”, 4”, 6”, 8”, 10”
EZO – flangeless, mates with ASME 150# and 300# Unlined – flangeless wafer, mates with ASME 125#, 150#, and 300#
EZO – Class VI Unlined – 1% of maximum Cv
Maximum Cv:
EZO – from 179 to 3815 Unlined – from 243 to 4406
Options:
P/P or I/P positioners, handwheel, position switches or solenoid
Materials:
Body – CI, CS, SST Stem – 17-4PH, 316 Disc – SST
Temperature range: -320° F to +500° F Pressure drop:
EZO – to 150 psid, (10.3 bard) Unlined – to 300 psid, (20.7) bard
Body sizes: 1/2”, 3/4”, 1” Maximum Cv:
Temperature range:
-20° F to +450° F, (-28.9 °C +232 °C)
Pressure drop:
Six sizes for metal seat 0.276 to 6.95 Three sizes for TFE seat 2.60 to 6.70
Metal seat – up to 1440 psid, (99.3 bard) TFE seat – up to 400 psid, (27.5 bard)
The Model 987 control valve offers precision control for chemical processes.
Materials:
Seat leakage:
Body and trim — 316L SST, Hastelloy C-22, and similar alloys
Class IV or Class VI
Options:
Stellite seating side-mounted handwheel, P/P and I/P positioners, position switches
End connections:
NPT, 150#, 300#, 600# Flanged, and Extended Pipe Nipples and DIN Flanges
7
Powered by FlippingBook