Asco 8040 Series Installation & Maintenance Instructions

NOTICE: See separate solenoid installation and maintenance
instructions for information on: Wiring, Solenoid Temperature,
Causes Of Improper Operation, and Solenoid Replacement.

DESCRIPTION

Series 8040 valves are 2-way normally closed direct-acting
solenoid valves designed for air or fuel gas service. Valve bodies
are made of rugged aluminum with trim and internal parts
made of steel and stainless steel. Series 8040 valves are
provided with a general purpose solenoid.
Series EF8040 valves are the same as Series 8040 except they
are provided with an explosionproof/watertight solenoid.
Provisions for Seat Leakage Testing
Series 8040H valves are provided with a 1/8I NPT downstream
side tap and pipe plug for checking seat leakage. Leakage
testing frequency shall be at least annually in accordance with
NFPA 86 or original equipment manufacturer recommendations.
T esting is also required after valve disassembly and reassembly for
inspection, cleaning or rebuilding.

OPERATION

Normally Closed: Valve is closed when solenoid is
de-energized; open when energized.
NOTE: No minimum operating pressure differential required.

INSTALLATION

Check nameplate for correct catalog number, pressure,
voltage, frequency, and service. Never apply incompatible
fluids or exceed pressure rating of the valve. Installation and
valve maintenance to be performed by qualified personnel.
Temperature Limitations
For ambient an fluid temperatures, refer to chart below.
[
None, KF,
8040G6
SF or SC
8040G7 8040G7
HT, KH,
8040G8
ST or SU
None, KF,
8040H6
SF or SC
8040H7 8040H7
HT, KH,
8040H8
ST or SU
[ Includes catalog numbers with Prefix EF"
e
50 Hanover Road, Florham Park, New Jersey 07932
I
-20_F (-29_C) to 125_F (54_C)
-20_F (-29_C) to 140_F (60_C)
-40_F( -40_C) to 125_F (54_C)
-40_F (-40_C) to 140_F (60_C)
MM All Rights Reserved.
I I
Positioning
This valve is designed to perform properly when mounted in
any position. However, for optimum life and performance, the
solenoid should be mounted vertically and upright to reduce
the possibility of foreign matter accumulating in the
plugnut/core tube sub-assembly area.
Mounting
For mounting dimension of body boss or optional mounting
bracket, refer to Figure 2.
Piping
Connect piping to valve according to markings on valve body.
Apply pipe compound sparingly to male pipe threads only. If
applied to valve threads, the compound may enter the valve and
cause operational difficulty. Avoid pipe strain by properly
supporting and aligning piping. When tightening the pipe, do
not use valve or solenoid as a lever. Locate wrenches applied to
valve body or piping as close as possible to connection point.
Valves should be checked for external leakage at piping
connections after installation, see Testing for External Leakage
section.

Testing for External Leakage

1. Block gas flow on downstream side of valve.
2. Apply pressure to valve within nameplate rating and energize
solenoid.
3. Apply a soapy solution or a commercially available leak
detecting solution to the pipe connections and check for
bubbles. If the valve has been tested for seat leakage or
disassembled and reassembled for inspecting, cleaning or
rebuilding, then apply the solution around the base of the
retainer plate and pipe plug.
*DuPont Co. Registered Trademark
Printed in U.S.A.
www.ascovalve.com
I
.
Page 1 of 4