M-60X Explosion Proof Series switches
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Non-Adjustable Flow Switches M-60X Series Explosion proof flow switch with in-line flow Features • Well suited for corrosive and non-corrosive gases or liquids • UL recognized for hazardous locations • Cenelec certified for intrinsic safety and encapsulation • Community Europe compliant • Universal mounting available The M-60X Explosion Proof Series low flow monitor switches monitor increasing and decreasing flow. They utilize a single moving part which responds to fluid (liquid or gas) flowing within a system (universal mountable units are fitted with a reset spring). These switches are suitable for a wide range of applications in industrial, biomedical, and OEM products. The flow monitors operate only when fluid is positively established. Applications • • • • • • Gas panels Sample flow monitoring Purge flows Pollution control monitors Hazardous fluid systems Gas seal monitors Operation Calibration Range * Air: 25,000 - 55,000 scc/min Water: 750 - 1,600 cc/min * For lower and higher trip points contact factory. Maximum flows through switch are higher. Specifications Set Point Accuracy: Repeatability: Hysteresis: Non-Adjustable Flow Switches The operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line, not to static or system pressures. In the presence of fluid flow, controlled movement of the piston actuates an external hermetically sealed reed switch thus producing the required signal. This signal can be used to actuate audible or visual alarms as well as relays, or other control. Piston travel is short which insures low hysteresis. Illustrated is the M-60X Pressure drop across flow Model with 1/4” ports. switch varies from 0.035 to 2 psi (at maximum flow rates for air and for liquid). Universal mounted units are outfitted with a spring which resets the piston. The spring is held in place using an orifice disc. ±10% maximum ±2% 15% • 316 Stainless Steel * Other materials available on request; only the 316 SS is Cenelec Certified. Custom Versions Available Malema welcomes the opportunity to apply its flow sensor experience to work for its customers. Please contact the factory for any special requirements; such as ports, extreme temperature and pressure capabilities, etc. malema flow sensors Port Sizes • 1/4” FNPT Catalog # 218: 1

M-60X Series Design Considerations/Construction The M-60X Series comprises a Body, Piston, and Retaining Rings. Selecting a Flow Switch begins with selecting the body; this series is available in 316 Stainless Steel, Monel 400, or Hastelloy 276. The M-60X Series contains one moving part (i.e. the piston) and two retaining rings that are in the fluid path (Universal mounting units are fitted with an orifice plate (spring disc) and a spring). Construction of the piston is important from a design perspective; we manufacture three types of pistons (it is critical to select the correct piston...

Non-Adjustable Flow Switches Installation & Maintenance The standard switch has to be mounted vertically in the position shown on the previous page for normally open conditions or for normally closed conditions (to convert from normally open to normally closed, use yellow and green leads instead of orange and green). Universal units can be mounted horizontally or vertically. Please advise mounting orientation while ordering, so that the factory can calibrate in the required orientation as calibration does change when changing orientation (i.e. if a universal mounted unit is required,...

M-60X Series Fixed Flow Setting Information This model is a FIXED flow switch. The flow set point is fixed at the factory and is NOT field adjustable. Proper calibration of the set point requires the following information. When purchasing a flow switch, use the “Set Point Calibration” form on page i-vi or provide this information on the purchase order. • Calibration set point, • Increasing or decreasing flow, • Fluid type (i.e. liquid or gas), • Density or specific gravity, • Viscosity, • System pressure and temperature, • Flow direction (i.e. upward or downward), and • Mounting orientation...