Dwyer 1638-1 Large Diaphragm Pressure Switch 0.20-1.0 w.c. Replacement 1638-1

Product Description

The Dwyer 1638-1 Large Diaphragm Pressure Switch is designed for meticulous control in HVAC and industrial applications. This switch supports a range of 0.20 to 1.0 inches of water column. It is engineered to handle electrical loads up to 15 amps without requiring additional relays.

• Visible set point indicator for straightforward adjustments.
• SPDT switch configuration to accommodate various electrical connections.
• Durable design approved by CSA, FM, and UL for general service.

Product Highlights

This pressure switch features a large diaphragm that offers precise low-range accuracy and a dependable performance for controlling air and non-combustible gases. Its rugged construction ensures reliable operation even under tough environmental conditions.

Product Information

Standard Information

• Brand: Dwyer
• MPN: 1638-1
• Category: Industrial Switches

Technical Specifications

• Pressure Range: 0.20 to 1.0 inches w.c
• Electrical Rating: 15 A @ 120-480 VAC, 60 Hz
• Temperature Limits: -30 to 110°F (-34.4 to 43.3°C)
• Agency Approvals: CSA, FM, UL
• Mounting Orientation: Diaphragm in vertical position
• Process Connections: 1/8 inch female NPT