Ueda Seisakusho VU74W Series Vacuum Switch

Manufacturer: Ueda Seisakusho Co., Ltd.
Model : VU74W series

Features

The VU74W series is a waterproof vacuum switch for outdoor use.
The body cover is made of aluminum die-cast, and the protective structure is equivalent to IP65 (IEC529).
It is suitable for narrowing the opening and closing vacuum difference (ON-OFF width) in negative pressure settings, and for upper limit alarms (single point setting) or lower limit alarms (single point setting).
The adjustment screw is fixed with a vibration and abuse prevention bracket.
The pressure receiving part uses phosphor bronze bellows as standard.
Stainless steel bellows are also available as an option for corrosive fluids, hot water, etc.

Item	Specification
Product Name	Outdoor waterproof vacuum switch
Size	W.96 x D.70 x H.146 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	100 MΩ or more with DC 500 V megger
Dielectric Strength	AC 2,000 V 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)
VU74W-76-1-R3	−10	−100	7.0	15	0.5
VU74W-76-2-R3	−10	−100	15	25	0.5

(A)	1 = Vacuum setpoint range (7.0 to 15 kPa) (refer to specifications)
(B)	R3 = R 3/8 (PT 3/8 thread) RC2 = Rc 1/4 (PT 1/4 thread) Note 1 RC3 = Rc 3/8 (PT 3/8 thread) Note 1
(C)	No code = Bellows and cap: Phosphor bronze, vacuum use (standard product) S = Bellows and cap: Stainless steel (SUS316)