Flowserve SLD User Manual

SLD

Synthetic Lubrication Device
Seal Support System

Installation

Instructions

Experience In Motion

SLD Installation Instructions

The following instructions are designed to simplify the installation of a typical
SLD (Synthetic Lubrication Device) seal support system. By reading this manual
and following its guidelines, seal performance can be improved by helping to
reduce the chances of premature failure attributed to improper installation or
use. In addition to these instructions, consult the seal assembly drawing included

for your specic seal design, materials of construction, critical dimensions,

and any auxiliary piping connections. If any problems arise during installation,

Do Not Try to Force Anything.

These instructions are written for trained, experienced technicians who are
familiar with the basic principles and tools involved in the installation, care
and service of mechanical seals and seal support systems.

A complete reading of these instructions by personnel in contact with
the equipment is essential to safety. Incorrect installation, operation
or maintenance can result in personal injury or death to personnel and
damage to the equipment.

Description

The SLD Seal Support System is a stand-alone system that dispenses a supply
of synthetic lubricant to the atmospheric side of mechanical seal faces during
periods of marginal equipment operation. Ideally suited for single mechanical
end face seals incorporating two hard carbide faces and a quench containment
device (QCD), it is primarily utilized in water based slurry applications when

operating ushless mechanical seal designs. The SLD Seal Support System

allows synthetic lubricant to be wicked between the faces due to centrifugal
action during periods of uncontrolled equipment cavitation or periods of
unintentional dry running. When proper dispensing rate is selected the SLD Seal
Support System may be able to take the place of a continuous water quench
traditionally used only as a means to help prevent seal face damage associated
with periods of starved operation. The SLD Seal Support System is not intended
to supply added cooling or able to dissolve scaling products that a continuous
water quench may provide. With a properly installed and functioning SLD Seal
Support System, friction generated heat levels leading to face damage have not
been observed in laboratory tests for periods of up to 30 minutes when normal
liquid pumpage is not present.

The SLD Seal Support System does not require compressed air, electricity, or
external water in order to function correctly. This makes it ideal for equipment
having frequent automatic start/stop sequences or for installations at remote

eld locations. The SLD Seal Support System should be a consideration for

use with new equipment that will be sitting at a job site for extended periods of
time prior to being placed into operation. The SLD allows for hand rotation of
shafts as requested by many bearing manufacturers to reduce scoring effects
to mechanical seal faces during the procedure. The SLD Seal Support System
can also help keep dirt, dust, and moisture debris from the atmosphere from

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contaminating the seal quench chamber. The SLD Seal Support System is a
single point lubricator and is not designed to supply more than one seal quench
cavity at a time.

Synthetic Lubricant

The specially formulated Flowserve lubricant (DS-920-OG) lubricant has been
selected because of its inert nature to acids and caustics and proven ability to
promote seal face survivability during periods of marginal hydraulic equipment
operation. The lubricant complies with Occupational Safety and Health Standards
(OSHA) regulations 29 CFR 1910.120 related to "Hazardous Waste Operations
and Emergency Response". To obtain best seal life, alternative lubricants
are not recommended. Contact your nearest Flowserve Sales and Service
Representative or Authorized Distributor for possible substitutes that will not
invalidate your mechanical seal warranty when used.

1 Initial Filling and Installation

1.1 Install mechanical seal cartridge in equipment with INLET quench
connection located towards the bottom and the OUTLET quench
connection located towards the top to allow for proper venting of seal
quench cavity. See Figure 1.

Mounting Details
SLD Seal Support System

Figure 1

6.4 mm ID (.25 inch ) x 125 mm (5 inch)

SLD grease gun

SLD grease

cartridge

Auto-Luber Unit

Temporary Plug

used for initial grease

gun lling

SLD

Grease Fitting

Pipe tee

6.4 mm ID (.25 inch) x 460 mm (18 inch)
Minimum pipe diameter and maximum
pipe length

Minimum pipe diameter and maximum
pipe length

Quench Chamber

Outlet Port

Cartridge

Mechanical Seal

End View

Quench Chamber

Inlet Port

1.2 Install INLET piping using 1/4 inch NPT [6.4mm (0.25 inch) minimum pipe ID]

to connect the pipe tee with the hydraulic lube tting to the bottom INLET

quench connection of the seal. The maximum length of pipe from SLD auto­luber to INLET quench connection of the seal should be 460 mm (18 inches).

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