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Overview

Oil pressure sensing devices for use on oil burner systems using any type of fuel oil, including heavy pretreated oils.

Features

  • Clear plastic cover allows observation of the pressure settings.
  • Models have snap-acting switching to open or close a circuit on pressure rise.
  • L404T High pressure limit, break a circuit on oil pressure rise above setpoint.
  • L404V Low Pressure limit, makes a circuit on oil pressure rise above setpoint.
  • Adjustments are made by screws on top of case.
  • Mount using 1/4 inch -18 NPT internal pipe threads or surface mount through base of case.
  • Ground screw terminal.

Product Specifications

Application
Oil pressure limit switch for fuel oil, including heavy oil applications
Dimensions (in.)
4 31/32 in. high x 4 1/2 in. wide x 2 3/4 in. deep
Dimensions (mm)
126 mm high x 114 mm wide x 70 mm deep
Mounting
1/4 in. NPT internal thread or surface mount through back of case
Approvals, Underwriters Laboratories Inc.
Listed: File No. MP2168, Guide No. MFHX
Approvals, Canadian Standards Association
Certified: File No. LR95329
Electrical Connections
Screw terminals
Contact Ratings
120 Vac Switch Contact-- 8.0 AFL, 48.0 ALR, 10.0 A resistive; 240 Vac Switch Contact-- 5.1 AFL, 30.6 ALR, 5.0 A resistive;
Operating Temperature Range (F)
-35 F to +150 F
Operating Temperature Range (C)
-37 C to +66 C
Sensor Element
Stainless Steel diaphragm
Operating Range (psi)
5 to 50 psi; 85 psi - Maximum Sustained
Operating Range (kPa)
35 to 350 kPa; 586 kPa - Maximum Sustained
Differential Pressure Range (psi)
6 to 14 psi
Differential Pressure Range (kPa)
40 to 100 kPa
Differential Type
Subtractive
Switch Operation
Auto recycle
Switching Action
SPST snap acting break on pressure rise
Pipe Connection
Main or High Pressure--1/4 in. NPT internal thread
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