Product Data

L404A,B PRESSURETROL® CONTROLLERS
SPECIFICATIONS
IMPORTANT Mounting: Hexagonal fitting on diaphragm has 1/4-18 NPT
The specifications given in this publication do not internal threads for mounting on a pipe or steam trap
include normal manufacturing tolerances. Therefore, (siphon loop). Also can be surface-mounted using
this unit may not match the listed specifications screws through two holes (knockouts) in back of case.
exactly. Also, this product is tested and calibrated
under closely controlled conditions, and some minor Dimensions: See Fig. 1. See Fig. 2 for mounting steam trap
differences in performance can be expected if those (siphon loop).
conditions are changed.
Weight: 2 lb. (0.91 kg).
Models: L404A and B Pressuretrol® Controllers. See Table 1.
Finish: Gray.
NOTE: A 14026 Steam Trap (siphon loop) is available,
except where noted in Table 1. The steam trap is Approvals:
necessary for boiler installations. Underwriters Laboratories Inc. Listed (L404A,B,C,D,F;
L604A,L only); file no. MP466, vol. 10, guide no. MBPR.
Switches: Mercury switches in all models. Canadian Standards Association certified (L404A,B,C,D,F;
L604A,L only); file no. LR1620; guide no. 400-E-0.
Pressure Sensing Element: Stainless steel diaphragm
(brass bellows in 300 psi [21.1 kg/cm2 (2068 kPa)] Replacement Parts:
models). 129178 Thermoplastic Cover.
14026 Steam Trap (siphon loop)–1/4 in. black iron pipe;
Ambient Temperature Range: -35°F (-37°C) to +150°F necessary for boiler installations.
(66°C).
Accessories:
NOTE: Also, see the NOTE in the Location and Mounting 33312B Knurled Adjustment Knob–with setscrew; fits on
section. main scale pressure adjusting screw.
4074BWJ Limit Stop Assembly–to limit setpoint ranges;
Adjustment Means: Screws on top of controller case. Scales includes 129564 Range Stop, 107194 Range Stop Screw,
are marked in psi and kg/cm
2
. and 23466 Wrench.
Electrical Connections: Internal screw terminals; hole in
side of case for 1/2 in. (13 mm) conduit.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada–Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
95C-10187B–1 2