Adjustable deadband, flanged chamber and side mount are featured in the
heavy duty reliable 225 series. A choice of four operating styles are offered: 1.
Single stage adjustable deadband suitable for pump operation; 2. Two stage
operation with adjustable lower stage, fixed upper stage for pump and high
alarm; 3. Fixed lower stage and adjustable upper stage for pump and low alarm;
4. Fixed upper and lower stage for high and low alarm. Alarm stages can also
be used for shutdown. Adjustable level changes are available in increments of
12", 24", 36", and 48".
Leak proof all welded heavy duty carbon steel bodies coupled with
snap action or mercury switches provide reliable, long term service for
compatible liquids. The use of an external magnet reduces the
possibility of magnetic particle build-up inside the armature tube and
subsequent loss of operation as may occur with the internal magnet
repulsion design. A variety of snap action or mercury switches in SPST,
DPDT or DPST configurations will satisfy most electrical requirements.
These switch assemblies are contained in NEMA-1 general purpose, NEMA-4X
weatherproof, NEMA-7- 9
groups B, C, D, E, F, G, explosion-proof or explosion-proof – vapor
Inexpensive yet rugged construction in a welded chamber control. The 291
series is specifically designed for single stage operation where
pressure does not exceed 350 psig (24 bar) at 100°F (38°C) or 300 psig
(21 bar) at 600°F (315°C) available with a
variety of hermetically sealed snap switch or mercury switch circuits
protected by a general purpose, weatherproof or explosion-proof
enclosure and will accommodate specific gravities down to 0.60.
Time proven magnetic head leak proof construction combines with a
heavy duty welded chamber to provide excellent reliability for control
of compatible liquids. Operating pressures of 1250 psig (86 bar) at
650°F (345°C) and 750 psig (52 bar) at 750°F (400°C) are standard. The
use of an external magnet reduces the possibility of magnetic particle
build up inside the armature tube and subsequent loss of operation as
may occur with the internal magnet repulsion design. The controls
feature carbon steel bodies and stainless steel internal trim. Process
mounting configurations include either side/bottom combination 1"
NPT/socket weld hubs, side/bottom flanges or side/side flanges. A
variety of hermetically sealed snap action or mercury switches are
available in SPST, SPDT, or DPDT action for single or two stage
operation. Mercury or Gold alloy snap action contacts are suitable for
low current DC applications. A full range of switch enclosures are
offered. Many chamber, enclosure and switch combinations are UL