Marshall Excelsior ME980-8 Installation Instructions Manual

READ AND UNDERSTAND ALL INSTRUCTIONS INCLUDED WITH THIS INSTRUCTION
WARNING!
Failure to follow these instructions or to properly
install and maintain this equipment could result in
an explosion and/or fire causing property damage
and personal injury or death.
Marshall Excelsior equipment must be installed,
operated, and maintained in accordance with
federal, state, and local codes and MEC
instructions. The installation in most states must
also comply with NFPA 58 or ANSI K61.1 standards.
Only personnel trained in the proper procedures,
codes, standards, and regulations of the LP-Gas or
anhydrous ammonia industries should install and
service this equipment.
Introduction
Scope of the Manual
This manual provides installation and maintenance
instruction for the ME980-6, ME980C-6, ME980-8,
and ME980C-8 Emergency Shutoff Valves and Cable
Release or Pneumatic Release Assemblies.
Description
ME980 Series(Figure 1) emergency shutoff valves are
intended for in-line use on LP-Gas or Anhydrous
Ammonia (NH ) service.
3
The valves may be installed at both ends of transfer
hoses where the hose connects the bulk plant piping
to the bobtail, transport, or tank car. They provide a
quick way of shutting off gas flow in the event of a
hose rupture and meet the requirements for such
service when correctly installed with a remote
release and proper piping support. The ME980 Series
ESV valves are lever operated, latch-open, and quick
closing valves. A fusible element in the stem
assembly melts if the temperature reaches 212°F
(100°C), allowing the valve to close.
The contents of this publication are for informational purposes only. While every effort has been made to ensure accuracy,
these contents are not to be construed as warranties or guarantees, expressed or implied, regarding the products or services
described herein or for their use or applicability. Marshall Excelsior Co. reserves the right to modify or improve the designs
or specifications of such products at any time without notice. The MEC™ logo is the trademark of Marshall Excelsior Co.
Form #496
Installation Instructions
For: ME980-6, ME980C-6,
ME980-8 and ME980C-8
MANUAL. RELIEVE ALL PRESSURE FROM SYSTEM BEFORE SERVICING VALVE
Marshall Excelsior Company
1506 George Brown Drive Marshall, MI 49068
Phone (269) 789-6700 Fax (269) 781-8340
www.marshallexcelsior.com
!!!WARNING!!!
Figure 1 ME980-6 shown in closed position
Operation
CAUTION!
The ME980 handle and shaft may break if the valve
is forced open against the gas flow and before
pressure is equalized on each side of the main valve
disk.
To Open a Closed Valve:
Close a shutoff valve downstream of the ME980.
Pull the ME980 handle to the "open" position. There
will be a delay in opening as inlet pressure helps hold
the valve disk closed against the seat. The initial
opening force on the handle opens a pilot valve in
the main valve disk, permitting pressure to build-up
downstream. When differential pressure across the
main disk has been reduced, the ME980 can be
opened without further difficulty by continuing to
pull the handle to the open position. When the
handle is fully open the latch engages to hold the
valve open.
Rev A