AirSep AS-E - Page 168

168 AS-D+—AS-P Series Instruction Manual
AirSep Corporation
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E--- 03/10
ASCO Valves
EASCO Valve, Inc.R 50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
R
Installation & Maintenance Instructions
SERIES
I&M No.V6941R4
2--WAY AUXILIARY --OPERATED PILOT-- CONTROLLED PISTON VALVES
8290
NORMALLY CLOSED OR NORMALLY OPEN OPERATION
1/2, 3/4, 1, 1 1/4, 1 1/2, 2 OR 2 1/2 NPT
BRONZE OR STA INLESS STEEL CONSTRUCTION
NOTICE: See separate Installation and Maintenance Instructions
for information on Solenoid Pilot Valve used in conjunction with
Series 8290 valves.
DESCRIPTION
Series 8290 valves are 2---way auxiliary--- operated, pilot--- controlled
piston valves designed for air, water, light oil or steam service. Valves
are normally closed or normally open construction, as required.
Valve bodies are made of bronze or Type 316L stainless steel;
elastomers are made of PTFE. Series 8290 valves are supplied wit h
a piston type operator having a diameter of 50, 63, 90 or 125 mm
depending upon customer requirements. Valves have an integral
position indicator, providing visual indication of Open and Closed
positions; with the exception of the 50mm operator.
OPERATION
Refer to operating instructions (to follow) and the graphs Auxiliary
Pilot Pressure vs Main Line Pressure. Use these graphs to determine
the minimum auxiliary pressure (filtered air or water) required for a
given main line pressure.
Normally Closed Operation: With auxiliary pressure removed valve
is closed. With auxiliary pressure applied valve is open.
Normally Open Operation: With auxiliary pressure removed valve
is open. With auxiliary pressure applied valve is closed.
IMPORTANT: Pressure is at Port 2 (e ntry under disc) for all liquids
and gases. For rapid cycling steam valves pressure is at Port 1 (entry
above disc).
NOTICE: See corresponding product leaflets (on valves and pilot
valves) for minimum and maximum pilot pressure, operating
pressure differential and fluid temperature.
Normally Open Valves (entry under disc)
Pag e 4 of 4
I&M No. V6941R4
EASCO Valve, Inc.R 50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
3834519