Products > Condensate Return Pumps
The Watson McDaniel PMP Series of Pressure
Motive Pumps are designed to transfer hot
condensate (or other liquids) without the use of electrical
power. The mechanical seals in standard electric condensate return
pumps begin to have difficulty when handling condensate in excess of 195°
F. Seal failure is virtually guaranteed when condensate temperatures
reach 203° F due to flashing of the condensate across the seal face. It
is therefore required to cool condensate in order to prevent seal failure
prior to pumping using electric pumps. PMPs do not have seals and
therefore will handle condensate well in excess of these
temperatures.
The primary application for the PMP is pumping condensate from a
process application or condensate collection area back to the condensate
return system. All PMP Series stand alone units are furnished with
pump tank, check valves, and internal pumping mechanism. The PMPSP Sump Drainer is a special PMP designed for pumping
water out of low lying areas or pits. It is an excellent solution where
there is no access to electricity.
Watson McDaniel also offers Pumps with Receiver
Tanks which consist of one or more stand alone pump units
connected to an appropriately sized receiver tank mounted on a common
base. Additional pumping units can be used for increased capacity or pump
redundancy in case of failure. Simplex, Duplex, Triplex and Quadraplex condensate pumping systems are available.
A Pump-Trap Combination (PMP with Steam Trap) is used
when draining condensate from a single piece of heat transfer equipment
whose steam flow is being controlled with a modulating type valve.
When a modulating valve controls the flow of steam to a heat exchanger, a
stall condition can develop. Stall occurs when the modulating valve
closes and steam pressure downstream of the valve is unable to push the
condensate into the return line and it backs up into the heat
exchanger. A pump-trap combination will eliminate this
problem. Watson McDaniel Pump-Traps are available
with either an internal steam trap (Model PMPT) or an external
steam trap (WPT Series).
Watson McDaniel’s fully-qualified fabrication facility is ASME
Code Certified. Our engineers can design and build complete custom condensate pumping systems to meet all your
requirements.
Non-Electric Pressure Motive Pump (PMP) Categories:
Stand-Alone PMP Units: Watson McDaniel PMP Series
Pressure Motive Pumps come complete with pump tank, check valves and
internal pumping mechanism. The following models are used for condensate
return applications:
PMPC - The Model PMPC pressure motive pump body &
cover are manufactured from Ductile Iron. ASME “UM” code stamp is available.
PMPF - The Model PMPF pressure motive pump is designed
for high pressure applications. Pump body and cover are
manufactured fromCarbon Steel and receive the ASME “UM” code stamp.
PMPSS - The Model PMPSS pressure motive pump body
& cover are manufactured from 304L Stainless Steel.
These tanks are designed to be used in harsh corrosive environments and
receive the ASME “UM” code stamp.
PMPBP - The Model PMPBP is an extremely
high-capacity pressure motive pump for applications requiring
large transfer of condensate or other liquids. Pump body and cover are
manufactured from Carbon Steel. The internal operating
mechanism functions identically to other pumps in the PMP series. ASME “U” code stamp is available.
PMPM - The Model PMPM pressure motive pump has an extremely low profile. These low-profile tanks
are required when draining condensate from process equipment positioned
close to the ground which limits the filling head of the pump. Pump body
and cover are manufactured from Cast Iron.
PMPLS- The Model PMPLS pressure motive pumps are low profile. These tanks are often required when
draining condensate from process equipment positioned close to the ground
which limits the filling head of the pump. Pump body & cover are
manufactured from Carbon Steel and receive the ASME “UM” code stamp.
The PMPSP Sump Drainer (also known as
“The Pit Boss”) is a special PMP designed for pumping
water out of low-lying areas or pits. Sump drainers are similar to
the standard PMP models except that they discharge the condensate
vertically upwards. This piping configuration allows them to easily fit
into below ground sump pits with limited space.
Watson McDaniel manufactures PMPs with Receiver Tanks.
The pumps are available in Ductile Iron, Cast Iron or Fabricated Steel.
The receiver tanks are manufactured from Carbon Steel. These units come
fully-assembled with one or more stand-alone PMP units and an
appropriately sized receiver tank, mounted on a frame and skid base.
Assemblies are available in Simplex (one pump), Duplex (two pumps), Triplex (three
pumps) and Quadraplex (four pumps).
Watson McDaniel Pump-Traps are available with either
an internal steam trap or an external steam
trap to suit individual application requirements:
The Model PMPT low-profile pressure motive pump has an internal steam trap for applications requiring compact
design due to spatial constraints. It is an excellent choice for drainage
of various modulating process equipment.
The WPT Series are stand-alone pump units with an
appropriately sized external steam trap preassembled at
the factory and mounted on a common base plate, allowing for easy
installation. Pump-Trap combos with an external trap are suitable when
capacity requirements exceed internal steam trap designs. These units are
available in several sizes and capacities.
Watson McDaniel’s fully-equipped ASME Code
Certified manufacturing facility stands ready to
assist you with all of your fabrication needs. Our engineering staff
specializes in the design of Pressure Motive Condensate Pumping
Systems for both industrial and institutional applications. You
can order either standard packages, available from stock, or specialized
systems to meet your specific needs. Contact factory for further
information.
Watson McDaniel Pressure Motive Pumps are available with
several accessories and options. In addition to the items shown above,
Watson McDaniel also offers the following accessories and options: ASME Code Stamps, Pre-Piped Pressure Regulating Valves,
Drip Leg Stations and Exhaust Lines, and Rebuilt Mechanisms.
Electric-Powered Pumps:
Watson McDaniel Models W4100 & W4200 Electric Condensate
Pumps are used for condensate return applications at temperatures
up to 190°F. The pump tanks are available in either Carbon Steel (W4100)
or Cast Iron (W4200). Standard features include Bronze-fitted centrifugal
pumps, energy-efficient 3450 RPM motors and heavy-duty float switch.
Available options include simplex or duplex packages, oversized or
Stainless Steel receivers, gauge glass, thermometer, discharge pressure
gauge, isolation valves, magnetic starter, mechanical or electrical
alternators, 1750 RPM motor, NEMA control panel and high temperature
(250°F) components.
Products > Condensate Return Pumps
Product Catalog -
Condensate Return Pumps