cashco 521 Installation, Operation & Maintenance Manual

ISO Registered Company
TOTAL TFE, GLOBE-PATTERN CON TROL VALVE
I. DESCRIPTION AND SCOPE
The Model 521 is a bellows sealed, globe-style control
valve fabricated from a tee-block of isostatically
com pact ed virgin TFE. Sizes are 1/2", 1", 1-1/2" and
2". The split body jacket is CF8 (304 SST) material.
All wetted internal parts are of isostatically compacted
TFE material. The standard stem material is of 316
SST; two optional Hastelloy C-276 stem material
con struc tions are avail able.
End connections are available to mate with 150#,
300# or DIN PN16, 25 or 40 flanges. Each flange
is drilled and tapped to receive stud bolting only.
The valve is designed for chemical service with fluids
that are normally corrosive to metallic materials.
For application pressure vs. temperature zone refer
to Model 521-TB, Graph No. 1 (pg. 3).
Actuators that may be mounted to a Model 521
body are Cashco Model C27 or Model C53, both
field reversible.
II. REFERENCES
Refer to Technical Bulletin 521-TB for complete
tech ni cal specifications of a Model 521 coupled with
either Cashco Actuator C27 or C53.
www.cashco.com/techbulletins/521.pdf
Refer to following Installation, Operation &
Main te nance Manuals (IOM's) for either actuator
and/or devices that maybe mounted to a Model 521:
Actuators: www.cashco.com/IOM/C27-C53.pdf
Positioners:
P/P: www.cashco.com/techbulletins/9540l.pdf
I/P: www.cashco.com/techbulletins/srd991.pdf
I/P: www.cashco.com/iom/PS2iom.pdf
INSTALLATION, OPERATION & MAIN TE NANCE MANUAL (IOM)
MODEL 521
BODY IOM
SECTION I
SECTION II
Model 521
with ATO - FC Actuator
ABBREVIATIONS
SST.......... Cast or Wrought Stainless Steel
HC ........... Wrought Hastelloy C-276
ATO-FC ... Air-to-Open, Fail Close
ATC-FO ... Air-to-Close, Fail Open
CCW ........ Counter Clockwise
CW ........... Clockwise
D or DIR ... Direct Acting
R or REV.. Reverse Acting
IAS ........... Instrument Air Supply
IOM .......... Installation, Operation and Maintenance
Man u al
SIG .......... Output Signal from Instrument
LOAD ....... Positioner Output Air Pressure
V .............. Vent
IOM-521
02-20