AMETEK 950 MD Mill Duty Housing LDT - Manual (Page 4)

950MD
Mill-Duty Housing
3
1080 N. Croo ks R o ad • C laws o n, MI 48017 • 8 00-635-0289 • 248-435-0700 • Fax 24 8- 435-8120 • www.ametekapt.com
Applications
The 950MD was originally designed for use in steel
mill applications but has proven to be reliable in many
applications where ruggedness, environmental protection
and ease of mounting are required. Some of these
applications include:
Steel Mills - Tundish car (Tundish height), turret height
(Caster), hydraulic coil cars, torch cutoff machine (torch
head monitoring), furnace tilt, electrode positioning, side
guide positioning, ladle slide gate positioning, louver or
roof position, etc.
Foundries, Forging and Casting – Linear transducers
with 950MD housings have been used on sand mold
compactors, furnace or oven doors and material transfer
systems.
Injection Molding and Die Casting – Proven effective
in monitoring/controlling the position of the clamp and/or
shot cylinder. The two point connection of the 950MD
housing allows for a simple retrofit by replacing limit
switches with an LDT for position feedback over the
entire range movement. Linear potentiometers can also
be replaced, thus eliminating their problems with drift,
temperature, and short life span.
Hydraulic Servo Applications - Ideal for installing
parallel to hydraulic cylinders including new applications
and retrofits. The major advantage to using the 950MD
housing versus gun drilling the cylinder for an LDT is that
the cylinder fluid flow is not compromised. If an LDT fails
within a cylinder it cannot be removed without having to
deal with the hydraulic fluid lines, pressure etc. Some
cylinders may be difficult to remove once installed, thus
inhibiting the removal of the LDT. The 950MD housing is
typically mounted parallel to the cylinder, the same as a
slave cylinder would be, so removal is greatly simplified
under these conditions.
Lock and Dam Sites - Miter gate and Tainter valve
position feedback systems have both benefited from the
950MD and LDT combination.
Gate Position Feedback - For hydro-electric plants,
water control structures, water and wastewater treatment
and managing, wickett gate position feedback for Turbine
speed control.
Optional Items
The standard Mill-Duty Housing includes the complete
housing assembly with provisions to accept an LDT and
all bolts, nuts and mounting hardware required for a
complete installation. There are also several optional
items available.
Vortex Air Cooler - The standard 950MD is equipped
with air purge ports. In many cases, running clean shop
air through the head is sufficient to cool the electronics.
For severe temperature applications a Vortex Air Cooler
may be desired. A Vortex Air Cooler accepts standard
shop air (80 - 100 PSIG). The air is ejected through a
generator in a Vortex spin chamber where the air stream
revolves in a tube at up to 1,000,000 RPM. In simplest
terms the inner stream gives off energy in the form of
heat to the outer stream and the inner stream exits the
opposite end as hot air. The Vortex Cooler is capable of
generating air flows as cold as -40° F.
Protective Boots - To give added protection to the
actuator rod, protective boots are available. These boots
attach between the end of the Mill-Duty guide tube and
the end of the actuator rod assembly. The boots are
offered in neoprene coated nylon for most standard
applications. They offer -60° F to 250° F operating range
with resistance to water and oil. Also, silicone coated
fiberglass offers high temperature resistance from -100°
F to 550° F; Teflon-coated fiberglass offers -100° F to
500° F operating range with a high degree of corrosion
resistance and optional stainless steel boots for rugged
applications.
Water-Cooled Head Assemblies - In applications where
extreme temperatures are present and air cooling is not
appropriate, water-cooled head assemblies are available.
Cooling jackets within the head assembly allow water to
flow around the electronics.
Front and Rear Mount Spherical Rod Ends - In
applications where two spherical rod ends are required,
rear mount spherical rod ends are available. The 3/4"
rear rod end attaches to a threaded bolt extending from
the rear of the head. The 3/4" front rod end is threaded
into the piston rod. An optional stainless steel version is
available. Mounting bolts are supplied with both
versions.
Delrin Liner - Used in longer horizontal applications,
typically 60” or longer to prevent wear on the LDT’s
guide tube as the 950MD housing is stroked. The Delrin
liner is installed inside of the 950MD barrel and prevents
sag of the LDT’s guide tube.