Cashco 521 - Manual

INSTALLATION, OPERATION & MAIN TE NANCE MANUAL (IOM)
Model 521
with ATO - FC Actuator
SECTION II
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
12-13
MODEL 521
TOTAL TFE, GLOBE-PATTERN CON TROL VALVE
BODY IOM
SECTION I
I. DESCRIPTION AND SCOPE
The Model 521 is a bellows sealed, globe-style con-
trol 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 fl anges. Each fl ange
is drilled and tapped to receive stud bolting only.
The valve is designed for chemical service with fl uids
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
fi eld reversible.
II. REFERENCES
Refer to Technical Bulletin 521-TB for complete
tech ni cal specifi cations 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