General
Description
This series of pilot operated 8316 valves has spring return diaphragms
with integral seats, resilient
discs, and stainless steel construction.
They are controlled through a special selection gasket which, by
following the instructions on the gasket cover, allows a choice of
internal or external piloting. They are ideally suited for actuator
control systems.
The valves are available in three solenoid versions: standard, low
power and intrinsically safe.
Applications
For emergency shutdown of a process control valve controlled by a
typical 3 to 15 psi signal: locate the solenoid valve in the signal
line, position the selection gasket for external piloting, and provide
a suitable external pilot source of 15 to 150 psi. When the electric
power is interrupted, or the auxiliary air falls below the proper
auxiliary pressure, the solenoid valve will exhaust the signal air
from the process valve actuator, shifting the process valve to its
original position.
If used in the internal pilot mode, in the event of loss of electrical
power, the valve shifts to its original position.
Specifications
Standard Enclosures:
Standard & Low Power Valves: Molded epoxy, Types 1, 2, 3,
3S, 4 and 4X combination General Purpose and Watertight, with 316
stainless steel conduit hub and stainless steel base plate, prefix
"EV".
Intrinsically Safe (IS) Valves: Type 4 Watertight 316 s.s.
prefix "WSIS".
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Electrical:
Standard Constructions: 24, 120, 240, 480 volts, AC, 60 Hz (or
110, 220 volts, AC, 50 Hz); 6, 12, 24, 120, 240 volts, DC
Low Power Constructions: 12 and 24 volts DC.
"IS" Constructions: 24 volts DC only. Minimum series
resistance of 200 ohms is required in wiring circuit if a safety
barrier is not used.
Nominal Ambient Temperature Ranges:
Standard Construction: AC Construction: -4°F to +125°F.
DC Construction: -4°F to +104°F
Low Power and "IS": -20°F to +140°F |
Valve Parts in Contact with Fluids:
All Constructions:
Body -- 316 s.s.
End Plate -- 316 s.s.
Seals and Discs -- low temperature Buna "N" on pilot valve.
FPM on diaphragm and disc of the main valve
Standard Constructions:
Core Tube -- 305 s.s.
Core Guide -- Acetal
Shading Coil -- Copper (AC only)
"IS" and Low Power Constructions:
Sleeve -- 304L s.s.
Rider Rings -- PTFE
Spring Retainer -- Celcon
Improtant: For use on clean, dry air or inert gas filtered to
50 microns or better. Instrument air in compliance with ANSI/ISA
standard S7.3-1975 (R1981) exceeds these requirements. To prevent
freezing, dew point of the media should be at least 18°F below the
minimum temperature to which any portion of the clean air or inert gas
system could be exposed.
Approvals:
"WSIS" Valves: FM J.I.3 W848 AX (3610) CSA File
LR-13976-116C. Solenoid Operator WSIS8003300.
Pending Approvals:
Standard and Low Power valve with prefix "EV": UL and
CSA.
Installation:
All valve may be mounted in any position. 316 stainless steel mounting
brackets are available. Add suffix "MB".
Ordering Information: Important: We must have catalog
number, voltage and Hertz.
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