Marshall Excelsior MEGR-198H Instruction Manual

Backpressure regulator/relief valve

MEGR-198H BACKPRESSURE REGULATOR/RELIEF VALVE

Instruction Manual-

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Description

Installation

Start-Up

Maintenance

Parts Ordering

Parts List

Marshall Excelsior Company

Marshall, MI 49068

269-789-6700

FAX 269-781-8340

www.marshallexcelsior.com

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 #904 Rev A

Table of Contents

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Page 1: Parts List
Marshall Excelsior Co. reserves the right to modify or improve the designs or specifications of such products at any time without notice.
Page 2: Specifications
Introduction 20 lbs (9.1 kg) for 1" NPT Shutoff Classification Class VI The MEGR-198H backpressure regulator is a manual, direct acting, self-operating, spring loaded, large capacity adjustable relief valve. It monitors upstream pressure and opens to relieve excess pressure when the upstream pressure increases above a set point.
Page 3: Maintenance
Check the unit for external leakage after rebuilding. Assembly. If it is a metal diaphragm unit, there should be two diaphragms in the unit. If there is any Before applying pressure to the “In” port of the MEGR-198H, damage Diaphragm, disassemble make sure that some range spring force is established as the Diaphragm Assembly and replace the Diaphragm.
Page 4 Iron Body, 3/4" NPT Iron Body, 1" NPT Iron Bonnet, drilled Orifice, 416 Comp. Valve Plug Pusher Post Diaphragm Assembly Gasket Range Spring Diaphragm, 302SS Table 1: MEGR-198H Range Springs O-Ring, Nitrile Wire Port Size NPT Spring Spring Range Diameter Adjusting Screw (inches)