Standard casing construction of all units is ASTM A48 Class 30
cast iron. All bronze casings are currently available in the D71
and D91 Series only. In all models, the discharge can be rotated
to any 90° position and NPT suction and discharge ports are
standard. Back pull out design allows the pump to be serviced without
disturbing the piping. The volute was designed to maximize hydraulic
Type 21 Buna-N seal is rated to 225°F and pressures to 175PSI
and is used on the D51, D61, D71, and D91 Series. The carbon seal
face mates with a ceramic seat providing years of trouble-free service.
The seal cooling jacket high temperature version of the D51 unit
uses a Type 21 Viton seal that is rated to 400°F with pressures
to 175PSI. Alternate seals available upon request.
The hydraulic design of the enclosed impellers maximizes pressure
and capacity while minimizing horsepower. All standard D Series
models feature a cast bronze impeller, while the high temp jacketed
version of the D51 utilizes a vacuum cast enclosed impeller made
of CDA87500 silicon bronze for high temperature resistance. This
high temp D51 also features a pressed-on throttle bushing which
fits snugly into the motor bracket to restrict hot fluid circulation
into the cooled seal cavity.
Standard construction for motor backets is ASTM A48 Class 30 cast
iron, while the D71 and D91 Series are also available in bronze.
Precise machining of the D Series motor brackets allows easy assembly
of the pumps. A 1/8" NPT hole is provided in the motor bracket
for a seal flush line if desired. The D51 also comes in a high temp
version that has a motor bracket with a cast-in seal cooling jacket
which allows fluids up to 500°F to be pumped without damage
to the mechanical seal or the motor. The seal chamber is specially
machined to allow minimal hot liquid circulation, which keeps the
area cool. The water jacket has 1/2" NPT ports every 90°
for easy water line connections.
The NEMA JM frame motor found on the D71 and D91 Series utilizes
a high carbon steel shaft. The NEMA 56J frame motors used on the
D51 and D61 Series utilize a 416 stainless steel shaft. The motor's
heavy duty ball bearings withstand heavy axial and radial thrust
loads. Standard enclosure type is open drip-proof with alternatives
available on request.