Regulators are more accurate and offer higher capacities than
standard direct-operated regulators. They will maintain constant set
outlet pressure even when inlet pressure fluctuates or variations in flow
occur. With the proper selection of pilots, these regulators will
accurately control temperature, pressure or a combination of both.
About Watson McDaniel
Watson McDaniel Company is a one-stop
source of industrial steam and fluid specialty products. Watson McDaniel
takes pride in manufacturing high-quality steam and fluid specialty
products for the industrial marketplace - since 1878.
Watson McDaniel is an ISO 9001 Certified and
ASME Qualified manufacturing company. Its manufacturing
facilities are among the best in the industry. Watson McDaniel serves the global
marketplace with a network of representatives, distributors,
manufacturing plants, and sales offices located throughout the world.
Watson McDaniel's goal and mission is to rapidly respond to
customers’ needs by providing cost-effective and reliable products and
services. To serve this purpose, the company offers a wide array of
quality products and exceptional service to its customers.
Phone: 847-356-0566 Fax: 847-356-0747 E-Mail: email@example.com
Select any of the category headings, images, or text links below for additional information.
Steam Traps are essential components of any steam system. They are used to discharge condensate, air or other non-condensable gases from a steam system while preventing the loss of steam. Steam traps are generally used in drip, process and tracing applications, and come in a variety of sizes and types to effectively handle various operating conditions. Proper selection of a steam trap is mainly dependent on the application type, condensate load and operating pressure.
Watson McDaniel offers an extensive line of Steam Traps to handle virtually any application. These include Thermodynamic, Thermostatic,
Float & Thermostatic (F&T),Inverted
Bucket, Clean Steam and
Bi-Metallic steam trap types. In addition,
Manifolds are available which are used for steam
distribution to tracing systems and for condensate collection.
Universal Style Steam Traps are available to
simplify installation and maintenance. These traps consist of a
Universal Connector and a Universal Steam Trap
Module. The Universal Connector is designed to be installed into
the pipeline and the Module is designed to easily connect or disconnect to
the Universal Connector. Watson McDaniel offers a complete line of
Universal Connectors and Universal Steam Trap Modules to handle a wide
range of applications.
The Watson McDaniel HD Series Pilot-Operated Main
Valve features aDuctile Iron body for increased
pressure and temperature ratings. It is ruggedly designed for
Steam Service and can be configured with a variety of
pilots or pilot combinations, giving this regulating valve extreme
versatility. Using the Standard Pressure (P) Pilot,
outlet pressure can be reduced in the range of 3-200
PSIG, depending on the selected spring. Maximum operating
pressure (PMO) for the HD Regulating Valve is 300
The following Pilots are available for use with the
HD Regulating Valve: P (Standard Pressure Pilot),
P5 (Special High-Accuracy Pressure Pilot),
BP (Back Pressure Pilot), T (Standard
Temperature Pilot), TRP (Lower-Range Temperature Pilot),
A (Air Pilot), DP (Differential Pressure
Pilot), S (Solenoid Pilot), PTL
(Direct-Mounted Temperature Controller used with Air Pilot),
PTR (Remote-Mounted Temperature Controller used with Air
The Watson McDaniel HSP Series Pilot-Operated Pressure
Regulating Valve is constructed of Cast Carbon
Steel for higher pressure and temperature ratings. With a
built-in spring-adjusted pressure pilot, this valve is specifically
designed for general purpose Steam pressure reducing applications. Outlet
pressure can be reduced in the range of 10-300 PSIG,
depending on the selected spring. Maximum operating pressure (PMO) for the
HSP Regulating Valve is 450 PSIG.
Noise Attenuation Equipment is used to reduce unwanted or excessive
noise that commonly occurs in pressure reducing stations. Watson McDaniel
Series-S Noise Attenuators are used in conjunction with Pressure
Regulating Valves to provide noise attenuations in the range of 5-30
Watson McDaniel offers several self-contained pressure reducing
valves for use with Steam,
Water, Oil and other liquids
The O Series Pressure Regulators are designed for use
with Steam, Air, Water and other liquids. These valves can regulate outlet
pressure in the range of 0-200 PSIG, depending on the
selected spring. Max inlet pressure is 250 PSIG.
The B Series Pressure Regulators are designed for use
with Water, Oil, Air and other liquids& gases. These valves can
regulate outlet pressure in the range of 1-125 PSIG,
depending on the selected spring. Max inlet pressure is 250
The 455 Series are balanced, Externally-sensed
Pressure Regulating Valves and are used for reducing pressure in Steam,
Air and Water systems. These valves can regulate outlet pressure in the
range of 1-125 PSIG, depending on the selected spring.
Max inlet pressure is 250 PSIG. Externally-sensed
regulators are often more accurate than internally-sensed regulators
because the sensing line is connected close to the process it is intending
to control and is far enough away from the outlet of the regulator to not
be affected by turbulence.
The 402 & 403 Series are Internally
Pilot-Operated Pressure Regulating Valves and are used for reducing
pressure in Steam and Air systems. These valves can regulate outlet
pressure in the range of 0-280 PSIG, depending on the
selected spring. Max inlet pressure is 250 PSIG for the
402 Series and 450 PSIG for the 403 Series.
Back Pressure/Relief Valves are used to maintain a
specific back pressure or to protect systems from an over-pressure
Watson McDaniel R-Series & 10691 Series Back
Pressure/Relief Valves are designed for low-capacity liquid
service (< 20 GPM). The R-Series can be used at set pressures in the
range of 1-300 PSIG, depending on the selected spring.
The 10691 Series has a soft EPDM seat for tight shut-off and can be used
at set pressures of 5-300 PSIG, depending on the selected
Watson McDaniel 3040 Series Back Pressure/Relief
Valves are designed for liquid and air service. They can be used
at set pressures in the range of 1-125 PSIG, depending on
the selected spring, and capacities up to 278 GPM,
depending on the valve size.
The Watson McDaniel W91 & W94 Series Self-Operating
Temperature Regulating Valves are used for accurately controlling
temperatures in both heating and cooling applications. These mechanically
operated valves are recommended for controlling the flow on relatively
stable systems, where small valve stroke modulations will control
temperature drift. (For systems with sudden or large load changes, or
rapid temperature changes, a pneumatically or electrically powered Control
Valve should be specified.)
A Control Valve is a device capable of modulating flow
at varying degrees between minimal flow and full capacity in response to a
signal from an external control device. The Watson McDaniel W910
Series Pneumatic Control Valve offers high quality at an
economical price and incorporates many features found only on more
expensive units. A variety of models are available to provide the flow
response required by the application.
In a process control loop, an Electronic Controller and Sensor is used
in conjunction with a Control Valve to maintain a process variable at a
desired set point. The controller compares the sensor signal to the set
point and outputs the appropriate response signal to the control valve.
The control valve will then modulate to provide the flow response required
to maintain the process variable at the set point. In the case of a
pneumatic control valve such as the W910 Series, a current-to-pressure
(I/P) transducer is required to convert the electrical signal from the
controller to the air pressure signal needed to operate the pneumatic
Watson McDaniel is unique in its ability to provide all of the
necessary components to create a complete control loop. Among these
components are the TR890 Series Electronic PID
Controller, the TA901 Electropneumatic (I/P)
Transducer, the TJD/TKD Thermocouple Temperature
Sensors and the TDD/TMD RTD Temperature Sensors.
The TA987 Air Filter/Regulator is available for filtering
and regulating plant compressed air for providing clean, dry air at the
proper pressure to the W910 Series Pneumatic Control Valve. In addition,
a variety of Thermowells are available to protect and
isolate the temperature sensor stems from the process fluid.
Liquid Drainers (also known as Liquid
Drain Traps) are primarily used to remove condensation from air and other
non-condensable gas lines. Watson McDaniel Liquid
Drainers are offered in a variety of models to handle a wide
range of operating pressures and condensate loads.
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 primary application for the PMP is pumping condensate from a
process application or condensate collection area back to the condensate
Stand-Alone PMP Units: Watson McDaniel manufactures
seven PMP models which come complete with pump tank, check valves and
internal pumping mechanism. Models PMPC (Ductile Iron),
PMPF (Carbon Steel High-Pressure), PMPSS
(Stainless Steel), PMPBP (Carbon Steel High-Capacity),
PMPM (Cast Iron Low-Profile) and PMPLS
(Carbon Steel Low-Profile) are designed for use in condensate return
applications. ThePMPSP Sump Drainer is a special PMP
designed for pumping water out of low-lying areas or pits. (This model is
also known as "The Pit Boss.")
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).
A Pump-Trap Combination 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 or an external steam trap to
suit individual application requirements:
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.
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.
Watson McDaniel's fully equipped ASME qualified
manufacturing facility stands ready to assist you with all of your
fabrication needs. Watson McDaniel 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
Watson McDaniel Models W4100 & W4200 Electric Condensate
Pumps are available for condensate 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.
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)
Watson McDaniel offers a wide range of specialty products for special purpose steam and fluid applications. These
include Stainless Steel Check Valves, Safety
Relief Valves, Steam Humidifiers, Air
Eliminators, Air/Steam Moisture Separators,
Thermostatic Air Vents, Vacuum Breakers,
Freeze & Scald Protection Valves,
Suction/Mixing Tees, Ejectors,
Y-Strainers, Drip Pan Elbows,
Exhaust Heads, Steam Trap Test Valves
and Flash Steam Recovery Vessels.
M&M Control offers a full line of Watson McDaniel Products.