Ueda Seisakusho PU74W Series Pressure Switch

Manufacturer: Ueda Seisakusho Co., Ltd.
Model : PU74W series

Features

The PU74W series is a waterproof outdoor pressure switch. It can be used outdoors in rainy or humid environments.
It is suitable for narrowing the open/close pressure difference (ON-OFF width) and for upper limit alarm (single point setting) or lower limit alarm (single point setting).
The adjustment screw can be fixed with anti-vibration and abuse metal fittings.
In addition, aluminum die-casting is used for the main body cover, and high shielding is ensured by weather-resistant neoprene packing.
Phosphor bronze bellows is used for the pressure receiving part, and stainless steel (SUS316) bellows can also be selected for corrosive fluids, hot water, etc.

Item	Specification
Product Name	Outdoor waterproof pressure switch
Size	W.96 x D.70 x H.123.5 mm
Protection structure	IP65 (IEC529) equivalent
Durability	Electrical & Mechanical Life: 300,000 times or more
Weight	Approx. 0.95 kg
Pressure Receiving Part	Bellows Type
Material	Phosphor bronze
Insulation Resistance	DC 500V Megger — 100 MΩ or more
Dielectric Strength	AC 2,000V for 1 minute

Model	Pressure Adjustment Range (Range) MPa		ON-OFF Pressure Differential Range (Diff.) MPa		Pressure Resistance (MPa)
Model	Minimum	Maximum	Smallest	Largest	Pressure Resistance (MPa)
PU74W-03-R3	0	0.3	0.02	0.06	1.0
PU74W-06-R3	0	0.6	0.03	0.08	1.0
PU74W-10-R3	0.1	1.0	0.035	0.1	1.5
PU74W-20-R3	0.2	2.0	0.09	0.2	2.5
PU74W-30-R3	0.5	3.0	0.14	0.28	3.5

(A)	06 = Maximum pressure adjustment range: 0.6 MPa
(B)	RC2 = Connection diameter Rc 1/4 (PT 1/4 thread) RC3 = Connection diameter Rc 3/8 (PT 3/8 thread) ※Note 1 R2 = Connection diameter R 1/4 (PT 1/4 thread) R3 = Connection diameter R 3/8 (PT 3/8 thread) ※Note 1 F6 = Connection diameter φ6 mm copper tube with flare nut ※Notes 1 & 2
(C)	No symbol = Bellows housing material: Phosphor bronze, brass ※Standard S = Bellows housing material: Stainless steel (SUS316)
(D)	No symbol = Without body mounting bracket B = With body mounting bracket

Note 1: Connection part materials are limited to phosphor bronze specification only.
Note 2: For φ6 flare type, product is configured with body mounting bracket.