Description
Core Product Summary
The United Electric Controls (UE) E48W-H16K is a heavy-duty industrial pressure switch engineered for critical alarm and control functions in harsh processing environments. Constructed with a die-cast aluminum enclosure meeting NEMA 4X / IP66 standards, the switch features a hermetically sealed microswitch (Option H) designed to protect electrical contacts from corrosive atmospheres, moisture, and chemical exposure.
Equipped with a 316L stainless steel bellows sensing element, the H16K model covers adjustable pressure ranges suitable for medium-to-high pressure monitoring applications. Its internal SPDT snap-action mechanism provides repeatable switching action across chemical processing plants, refineries, power generation facilities, and pipelines.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | United Electric Controls (UE) |
| Model / Series | E48W-H16K (400 Series Architecture) |
| Product Type | Heavy-Duty Industrial Pressure Switch |
| Switch Output | Single Pole Double Throw (SPDT) snap-action microswitch |
| Switch Protection | Option H: Hermetically sealed microswitch capsule |
| Enclosure Rating | NEMA 4X / IP66 rated, epoxy-coated die-cast aluminum |
| Sensing Element | 316L stainless steel welded bellows |
| Pressure Port Connection | 1/2″ NPT Female stainless steel connection |
| Electrical Connection | 1/2″ NPT Female conduit connection with internal terminal block |
| Adjustable Set Point | Internal multi-turn adjustment screw with reference scale |
Detailed Product Overview
The United Electric Controls E48W-H16K pressure switch provides reliable setpoint enforcement in environments where hazardous gases, corrosive air, or extreme weather conditions can impair standard open-contact switches. The integration of the “H” option places the electrical switching contacts inside a hermetically sealed capsule, preventing contact oxidation and spark ignition risk in dirty or chemical-laden plant atmospheres.
The H16K sensor design incorporates a welded 316L stainless steel bellows structure that responds to pressure changes by mechanically actuating the sealed microswitch. Stainless steel bellows offer high fatigue resistance and linear response under pressure cycling, making the unit well-suited for hydraulic monitoring, compressor control, pump protection, and turbine lube oil systems.
A tamper-resistant internal setpoint adjustment screw allows engineers to calibrate switching thresholds accurately against an internal reference scale. The rugged NEMA 4X die-cast aluminum housing features a gasketed cover to maintain environmental sealing during continuous outdoor exposure.
E48W-H16K
E48W-H16K
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Process Piping | 1/2″ NPT Male pipe connection | Ensure thread sealant compatible with process media is applied. |
| Conduit & Wiring | 1/2″ NPT electrical conduit entry | Use waterproof conduit hubs/fittings to maintain NEMA 4X sealing. |
| Media Compatibility | Process fluids compatible with 316L Stainless Steel | Suitable for steam, air, water, light oils, and non-corrosive chemicals. |
Dimensions, Mounting & Connection Notes
- Enclosure Mounting: Can be surface-mounted directly via process piping connection or attached to a pipe/wall bracket using the enclosure mounting holes.
- Process Porting: Features a 1/2″ NPT female stainless steel process connection; hold the hex flat with a wrench during installation to prevent internal torque damage.
- Wiring Access: Access terminal connections by loosening the gasketed front cover screws; wire through the 1/2″ NPT conduit connection to internal screw terminals.
- Set Point Calibration: Adjust setpoint by turning the internal calibrated dial screw; verify trip point using a certified pressure gauge and calibrated pressure source.
FAQ
What is the UE E48W-H16K?
The UE E48W-H16K is a heavy-duty industrial pressure switch featuring a hermetically sealed microswitch and a 316L stainless steel bellows sensor.
What does the “H” designation mean in the E48W-H16K model code?
The “H” indicates an integrated hermetically sealed microswitch option that isolates electrical contacts from corrosive, humid, or hazardous ambient air.
What is the enclosure rating of the UE E48W-H16K pressure switch?
The switch is housed in an epoxy-coated die-cast aluminum enclosure rated for NEMA 4X and IP66 environmental protection.
What process connection size does the unit feature?
The switch comes standard with a 1/2″ NPT female stainless steel process connection port.
What material is used for the pressure-sensing element?
The H16K model utilizes a welded 316L stainless steel bellows as its primary pressure-sensing element.
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