Scope Of Delivery; Accessories; Description And Function; Description Of The Product - Wilo SCPV Installation And Operating Instructions Manual

5.4 Scope of delivery

Pump can be delivered
As a complete pump set including electrical motor,
base plate, coupling and coupling guard;
Either without motor or
As bare shaft pump without base plate.

5.5 Accessories

Companion Flange
Foundation bolts
Shims
6 D e s c r i p t i o n and function

6.1 Description of the product

SCPV pumps are single stage pumps. They are of
relatively simple construction, the casing being split
along the pump axis so that normal maintenance
work can be carried out without disturbing the
position of either the pumping set or pipe work.
6.1.1 Casing
The pump casing is of single volute form, cast in
halves, which are bolted together along the pump
axis. Gaskets are provided between the split flanges
of top and bottom casing. The suction and delivery
branches of the pump are cast integral with bottom
half casing, which is connected to pump stool.
Tapings are drilled in suction and delivery branches
for connecting the pressure gauges and providing
casing drain. Bores of bottom half casing are grooved
to provide location for neck rings. Tapings are
provided in top half casing for taking water
seal/flushing connection to the stuffing box. Tapings
are also provided on top of casing for mounting air
cock for venting. The top frame can be mounted
directly on the vertical frame and the goal post
arrangement.
6.1.2 Neck ring
To prevent the entry of pump liquid from delivery
side of impeller to suction side, neck ring is provi-
deed. Fine running clearance is provided between
neck ring and impeller neck. Periodic restoration of
this clearance is
performance of the pump. For two stage pumps
these neckrings are located in the bottom half of
the casing by half-spigot (Tung and groove) and its
rotation is restricted by flat face of the top casing.
For rest of the single stage pumps plain neck rings
with neck ring pins in bottom casing for locking are
used. The neck ring pin is press fitted in the neck
ring.
Installation and operating instructions Wilo – SCPV pumps
necessary for satisfactory
6.1.3 Sealing system
To prevent leakage along the shaft at the point of
emergence from the pump casing, gland packing or
mechanical seals may be fitted in the stuffing box
situated at each end of the casing.
Gland Pack
For SCPV pumps plaited cotton impregnated with oil and
colloidal graphite is used.
Mechanical Seal
For SCP pumps Burgmann made MG1 or M7 mechanical
seals are used
11