Marwin Valve 3L/T 2100F-A Series 3-Way Ball Valve User Manual

Scope, Applicability, Caution

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3170 Wasson Road • Cincinnati, OH 45209 USA

Phone 513-533-5600 • Fax 513-871-0105

[email protected] •

I & M 3L/T-2100F Series

Installation & Maintenance Instructions for

Marwin 3L/T-2100F Series Three Way Ball Valves

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 leak-
age or other malfunction, call a qualified service person; continued operation may cause system failure or a general

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 in-
structions can save hours of trouble and downtime later.
When making repairs, use only genuine Marwin Valve
parts, available for immediate shipment from the factory.


This manual is intended as a guide to assist customers
in the storage, installation, and maintenance of Marwin
3L/T-2100F Series three way ball valves. Subsequent
additions or special instructions will be provided
for special ball valves, critical service or customer


This manual is applicable to the 3L/T-2100F-A (threaded
end) and 3L/T-2100F-F/G (flanged end) Series Marwin
three way ball valves.


1. Valve pressure ratings are based on many variables,

including valve series and size, as well as body, seat
and bolt material. Verify that application does not
exceed the pressure or temperature rating on the

2. Always depressurize the line with the valve in the

OPEN position before disassembly. Cycle valve in
depressurized line before loosening bolts.

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


5. To ensure safety and maintain warranty, never

modify valve in any way without prior approval from


Lubricant is used on all internal surfaces. This may be
removed with a solvent if found objectionable. All valves
are adequately packed in a strong cardboard case in
such a way as to avoid any possible damage during
transport and storage.

If ball valves are not destined for immediate use, the fol-
lowing 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 immedi-
ately prior to installation.

4. It is advisable to store the valves in dry conditions.

Ball valves should be protected to safeguard against
humidity, moisture, dust, dirt sand, mud, salt spray
and seawater.

5. Valves with actuators shall be stored in dry


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

1/2”-2” Typical

6” Typical

2-1/2”-4” Typical