Flowserve Seal Gard - Manual (Page 2)

2
Description
The Seal Gard is engineered to regulate and monitor the flow of flush water, or
other sealing fluids, to a seal chamber containing a single, double, or tandem
Flowserve seal, or to protect compression packing. The Seal Gard I is equipped
with a single flowmeter and one flow control valve to supply a flush to a single
Flowserve seal, Plan 32 or to a lantern ring of a packed stuffing box. The Seal
Gard II is equipped with dual flowmeters and two flow control valves. The two
flowmeters are unitized and used to control and monitor both the inlet and outlet
of a double seal barrier fluid system, Plan 54 or to and from lantern ring taps of
a stuffing box with a "balanced" flush of compression packing. For a double seal,
the barrier fluid is maintained at a pressure higher than that of the product. The
Seal Gard II can also be used to monitor the buffer fluid between the inner and
outer seal of a tandem Flowserve seal, Plan 52. Here the pressure between the
seals is maintained at a pressure lower than that of the product acting on the
inner seal.
Tools needed for installation:
• Wrenches, piping, and fittings for 1/4 inch NPT.
• Screwdriver to set flow control valves.
1 Seal Gard I Installation (See Figure 1)
1.1 Mount the Seal Gard body in a vertical position to a:
• Control panel, the Seal Gard is supplied with taps for panel mount.
• Wall, an optional wall mounting plate is available.
• Pipe stand, an optional pipe stand mounting plate is available.
• Pump flange, an optional pump flange mounting plate is available.
1.2 Locate the Seal Gard in a convenient location:
• In easy view. It may be best to locate the Seal Gard in easy view of the
operator and run the necessary tubing / piping.
• Accessible for cleaning.
• In an area free of vibration, traffic, or other conditions or equipment that
could damage the Seal Gard.
1.3 Provide a supply of flush liquid (usually water) to the Seal Gard.
Supply must be:
• reliable, clean, and compatible with acrylic (no steam, alcohol, etc.).
• constant pressure at least 15 psi (1 bar) above that of the product
being sealed and below 100 psi (7 bar). The pressure upstream of
the unit may have to be controlled by a pressure regulator if the supply
pressure is variable. Options of a constant flow regulator and gauges with
higher pressure ratings are available from Flowserve.
• Install a valve in the supply line (normally full open) to be closed while
cleaning or repairing the Seal Gard.