Flowserve Uniseal Series BW Seals - Manual (Page 5)

For Plans 11, 21 and 32:
Shaft Rotation Inlet Plugged
(from exposed end of gland) Port
Clockwise (CW) Port b Port a
Counterclockwise (CCW) Port a Port b
For Plan 13:
Shaft Rotation Outlet Plugged
(from exposed end of gland) Port
Clockwise (CW) Port a Port b
Counterclockwise (CCW) Port b Port a
5
3 Piping Recommendations
3.1 Install and maintain an adequate piping plan. The Uniseal requires a
clean, cool environment for maximum seal life. Typical piping plans are
listed below. Contact Flowserve for additional piping plan information or
technical support.
Plan 11: default inner seal flush from pump discharge on horizontal
pumps (single seals)
Plan 13: default inner seal flush and vent from pump suction on
vertical pumps (single seals)
Plan 21: inner seal flush from pump discharge through a cooler for use
with hot products (single seals)
Plan 32: inner seal clean external flush for use with abrasive products
or products that are incompatible with the seal (single seals)
Plan 52: dual seal circulation through a low pressure reservoir
(dual seals)
Plan 53: dual seal circulation through a pressurized reservoir
(53A), finned tube array (53B) or
piston accumulator
(53C) (dual seals)
CW
Rotation
F
D
F
Q
CCW Rotation
a b
Plan 62: external quench on
atmospheric side of
seal (single seals)
3.2 For single seals, follow the port
connections listed below, see
Figure 6. Quench and Drain
ports on single seals should be
plugged if not used
as a good
housekeeping practice.
Single seal port connections
Figure 6