NEW EQUIPMENT & MATERIALS
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In case of fire, the sudden rise in temperature will cause the alarm to sound. The thermostat control is set for approximately 140° F., at which point the alarm will go off. The alarm stops when the temperature drops back to 100° F. Electric current is used only during sounding of the alarm. A safety lock is designed to hold the unit in place, preventing any tampering. Dept. IEC, Gardner Laboratory, Inc., Bethesda 14, Md.
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Electric Valve Controller for Automatic Valve Operation Remote or automatic valve operation is possible using this new all-electric rotary valve controller. The unit is a self-contained gear motor with hollow output shaft that receives the valve stem. Stem diameters from 1/4 to 1 inch can be used. A built-in potentiometer pro-
"NATIONAL" APRON CONVEYOR DRYER While this comparatively small Apron Conveyor Dryer was installed to immediately provide pilot plant production, it is readily a d a p t a b l e to expansion to meet future large-scale production requirements. incorporates
all
the
features
available
in the
largest
It
"National"
Dryers of this t y p e , including the following: The most efficient air control devices, to assure absolute uniformity o f air distribution and condition through the material. W i d e flexibility in air delivery b y use of adjustable pitch fans. Adjustable sealing of air to eliminate leakage and dust carry-over to chain and other parts of equipment. Newest heavy-duty trussed-type apron hinges. Latest devices for chain alignment control and lubrication. Send for Folder Describing "National"
Single and
Multiple Apron Conveyor Dryers and Related Equipment
THE
DRYING MACHINERY COMPANY LEHIGH AVE. and HANCOCK ST., PHILADELPHIA 33, PA. England
Agent: JONES & HUNT, I N C . , Gloucester, M o u .
Cable Addreti.· " N A D R V M A " — W . U. C o d ·
For further information, circle number 124 A on Renters' Service Card, page 129 A
124 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
Electric valve controller
vides remote indication of valve position or can be used as a part of a balanced bridge control. The balanced bridge control can be used where the valve setting must be proportioned to a signal that may originate from liquid levels, flow rates, or other sources. Dept. IEC, The Jordan Co., Inc., 3235 W. Hampton Ave., Milwaukee 9, Wis.
Pneumatic Pressure Transmitter This pressure transmitter eliminates the need for a separate field gage. It measures pressures of 0 to 6000 p.s.i., transmitting a 3 to
