Marwin Valve 8700 Series Installation & Maintenance Instructions

3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
marwin@richardsind.com • www.marwinvalve.com
Warning: Marwin Valve ball valves must only be used, installed and repaired in accordance with these Installation & Maintenance Instructions.
Observe all applicable public and company codes and regulations. In the event of leakage or other malfunction, call a qualified service person;
continued operation may cause system failure or a general hazard.
Please read these instructions carefully!
Your Marwin Valve product will provide you with long,
trouble-free service if it is correctly installed and main-
tained. Spending a few minutes now reading these
instructions can save hours of trouble and downtime
later. When making repairs, use only genuine Marwin
Valve parts, available for immediate shipment from the
factory.

Scope

This manual is intended as a guide to assist custom-
ers in the storage, installation, and maintenance of
Marwin 8700 Series ball valves. Subsequent additions
or special instructions will be provided for special
valves, critical service or customer requirements.

Applicability

This manual is applicable to the 8700 Series Marwin three
piece ball valves.
Caution
To help prevent injury to personnel or damage to
equipment, please read this section completely before
performing any operations.
1. Valve pressure ratings are based on many vari-
ables, including valve series and size, as well as
body, seat and bolt material. Verify that application
I & M 8700 Series
Installation & Maintenance Instructions for
Marwin 8700 Series Three Piece Ball Valves
does not exceed the pressure or temperature rating
on the nameplate.
2. Always depressurize the line with the valve in the
open position before disassembly. Cycle valve in
depressurized line before removing valve.
3. Wear protective equipment and take appropriate
precautions to safeguard against injury caused by
the discharge of trapped fluids.
4. Use only Marwin recommended spare parts for
Maintenance.
5. To ensure safety and maintain warranty, never
modify valve in any way without prior approval from
Marwin.
A petroleum-based oil (silicone free) is used as lubrica-
tion on all internal surfaces. This may be removed with
a solvent if found objectionable. All valves are adequate-
ly packed in a strong cardboard case in such a way
as to avoid any possible damage during transport and

storage.

Caution: if ball valves are not destined for immediate
use, the following precautions should be taken:
1. If possible, leave the ball valves in their packing
cases during the period of storage.
2. Ball valves must remain in open position during this time.
3. In order to prevent damage, protective plastic
covers on valve ends should not be removed until
immediately prior to installation.
4. It is advisable to store the valves in waterproof con-
ditions. Ball valves should be protected to safeguard
against humidity, moisture, dust, dirt sand, mud, salt
spray and seawater.
5. All valves complete with actuators are to be stored
in dry conditions.
6. Valves to be stored for a long period of time should
be checked by the quality control personnel every
six months; every three months when valves are
automated.
Storage