Asco 8042 Series Installation & Maintenance Instructions

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

DESCRIPTION

Series 8042 valves are 2-way normally closed internal
pilot-operated solenoid valves design for fuel gas service. Valve
bodies are made of rugged aluminum with trim and internal parts
made of steel and stainless steel. Series 8042 valves may be provided
with a general purpose or explosionproof solenoid enclosure.
Provisions for Pressure and Seat Leakage Testing
(See Figure 1.)
Series 8042 valves are provided with four 1/8I tapped and plugged
holes, two on either side of valve body. Two upstream for pressure
testing; two downstream for seat leakage testing. Leakage testing
frequency shall be at least annually in accordance with NFPA-86 or
original equipment manufacturer recommendations. Testing 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 valve ambient and fluid temperatures, refer to chart below.
59.5 or 66 H
59.5 or 66 [ F
[ When valve catalog number is prefixed RFB or RFF.
Positioning
Valve must be mounted with solenoid vertical and upright.
*DuPont's Registered Trademark
e
I I I I
32_F (0_C) to 104_F (39_C)
32_F (0_C) to 77_F (25_C)
MCMXCVII All Rights Reserved.
I I

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 apply the
solution around solenoid base sub-assembly, bonnet/body joint
and pipe plugs.
4. If leakage exists, depressurize valve and turn off electrical power
supply. Tighten connections as required and retest following the
above steps.
NOTE: It is not necessary to remove the valve from the pipeline for
repairs.
Printed in U.S.A.
50-60 Hanover Road, Florham Park, New Jersey 07932

MAINTENANCE

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