ASCO Valves EV8308G360 Installation & Maintenance Instructions

Installation & Maintenance Instructions
3-WAY MANUAL RESET PNEUMATIC/SOLENOID OPERATED VALVES
NO-VOLTAGE RELEASE & ELECTRICALLY TRIPPED
1/2" AND 1/4" NPT - 5/8" AND 5/16" ORIFICE - STAINLESS STEEL CONSTRUCTION
WARNING: Do not disassemble this valve
except as required to replace solenoid.
AVERTISSEMENT:
vanne sauf si il faut remplacer la bobine.
NOTICE: See separate
Maintenance instructions for information on: Wiring,
Solenoid Temperature, Causes of Improper Operation, and
Solenoid Replacement.

DESCRIPTION

EV8308G360 & EV8308G361 valves are 3-way, normally
closed, no-voltage release, manual reset pneumatic/solenoid
operated valves. EV8310G361 valve is a 3-way, normally
closed, electrically tripped (TSO), manual reset pneumatic/
solenoid operated valve. (Please see Flow Diagram for
Electrically Tripped Operation). Valves bodies are made of CF-
8M stainless steel with internal parts of stainless steel; elastomers
are Fluorocarbon, Fluorosilicone and Nitrile. The manual reset
assembly is anodized aluminum.

OPERATION

Auxiliary Piloting allows a zero minimum main line pressure
with the application of proper auxiliary air pressure. Refer
to Table 1, Operating Pressure Differential, and the graph
Auxiliary Pilot Pressure vs Main Line Pressure. Use this graph
to determine the minimum auxiliary air pressure required for a
given main line pressure.
Auxiliary Line Pressure vs Main Line Pressure
(Minimum Auxiliary Air 25 psi)
120
105
90
75
60
45
30
15
0
0 15 30 45 60 75 90 105 120 135 150
Main Line Pressure PSI
Table 1. Operating Pressure Differential
Valve
Main valve
Pilot valve
®
ASCO Valves
© ASCO Valve, Inc. 160 Park Avenue, Florham Park, New Jersey 07932
NORMALLY CLOSED OPERATION
Ne démonter pas cette
solenoid installation
Minimum Maximum
0 150 psig
25 125 psig
E269586 - 04/2017
For No-Voltage Release Operation
Unlatched - Solenoid De-energized: With valve unlatched and
the solenoid de-energized, main valve fl ow will be from cylinder
to exhaust. The pressure port is closed, whether or not auxiliary
pressure is present.
Latched - Solenoid Energized with Auxiliary Pressure
and
Applied: With solenoid energized and auxiliary pilot pressure
present, the valve may be manually operated (shifted) by raising
the handle until it latches the operator in the (up) latched position.
In the latched position, main valve fl ow will be from pressure to
cylinder. Exhaust will be closed. When solenoid is de-energized,
valve will return (trip) to the (down) unlatched position. Valve
can not be latched, until solenoid is energized, auxiliary pressure
applied, and handle is raised to the (up) latched position.
NOTE: Upon solenoid de-energization or loss of auxiliary pilot
valve pressure, valve will return (trip) to the unlatched position.
Valve can not be latched until auxiliary pilot pressure is restored,
solenoid is energized and lever handle is raised. The valve is now
latched.

Flow Diagrams for No-Voltage Release

UNLATCHED
DE-ENERGIZED
PILOT
EXH
PILOT
PRESSURE
PILOT
PISTON
CYLINDER
EXH
PRESS

For Electrically Tripped (TSO) Operation

Apply proper auxiliary pressure to port 3 of the pilot valve. Port 2
is now the auxiliary exhaust port - DO NOT BLOCK OFF.
Latched - Solenoid De-energized: With solenoid de-energized,
raise the handle until it latches in the (up) latched position. Main
valve fl ow is now from the pressure to the cylinder port. The
exhaust port of the main valve is closed.
All Rights Reserved.
www.ascovalve.com
I&M V_9602_R2
'3'
PILOT VALVE
PILOT
PRESSURE
'2' '1'
PILOT
PISTON
CYLINDER
MANUAL RESET
AUX
MAIN VALVE
CYL
PRESS
I&M V_9602_R2
CATALOG
EV8308G360
EV8308G361
EV8310G361
Low Power
LATCHED
ENERGIZED
PILOT
EXH
'3'
'2' '1'
EXH
AUX
CYL
Page 1 of 4