Ueda Seisakusho PL-550 Series Pressure Switch

Manufacturer: Ueda Seisakusho Co., Ltd.
Model : PL-550 series

Features

The PL-550 series is a general-purpose pressure switch that is widely used in all industries.
The features of this pressure switch are different from those for general compressors or pumps, and it is ideal when you want to set a narrow opening and closing pressure difference (ON-OFF width).
It is mainly used for water pressure, pneumatic pressure, hydraulic pressure, etc. related to instrumentation.
A metal bellows is used for the pressure receiving part, and the snap action type switch with few malfunctions and variations and the quick action mechanism at the tip of the main operating lever make this a pressure switch with a long life and high reliability.

Item	Specification
Product Name	Indoor General-Purpose Pressure Switch
Size	W.126.5 × D.74 × H.171.5 mm
Protection Structure	IP40 (IEC529) equivalent
Durability	Electrical & Mechanical Life: 300,000 times or more
Weight	Approx. 1.3 kg
Pressure Receiving Part	Bellows Type
Material	Phosphor Bronze

Model	Pressure Adjustment Range (Range) MPa		ON-OFF Pressure Differential Range (Diff.) MPa		Pressure Resistance (MPa)
Model	Minimum	Maximum	Smallest	Largest	Pressure Resistance (MPa)
PL-550-1-R3B	0	0.16	0.012	0.1	1.5
PL-550-2-R3B	0	0.3	0.015	0.2	1.5
PL-550-3-R3B	0.01	0.5	0.02	0.3	1.5
PL-550-4-R3B	0.02	0.7	0.025	0.35	1.5
PL-550-5-R3B	0.05	1.0	0.03	0.4	1.5
PL-550-6-R3B	0.2	2.0	0.08	0.5	2.5
PL-550-7-R3B	0.5	4.0	0.15	1.0	5.0
PL-551-10-R3B	0	0.12	0.005	0.06	0.5
PL-551-11-R3B	0	0.2	0.005	0.15	0.5
PL-551-12-R3B	0.01	0.5	0.01	0.25	1.0
PH-550-8-R3SB	0.5	6.0	0.2	1.0	10
PH-550-9-R3SB	1.0	8.0	0.35	2.0	10

*PH-550-8 and PH-550-9 are for high pressure control and the standard material for the pressure receiving part is stainless steel (SUS316).

(A)	PL = For low and medium pressure PH = For high pressure
(B)	550 = Indoor general-purpose type 650 = Indoor dustproof/drip-proof type
(C)	No symbol = Contact configuration 1a1b (*See note for details) W = Contact configuration 2a2b
(D)	5 = Pressure adjustment range (Refer to specification table)
(E)	R3 = Connection thread R3/8 (PT 3/8 thread) G3 = Connection thread G3/8 (PF 3/8 thread) F6 = Connection thread G6mm copper pipe flare fitting (*See notes 1 and 2)
(F)	No symbol = Bellows and housing material: Phosphor bronze, brass S = Bellows and housing material: Stainless steel (SUS316)
(G)	No symbol = Without mounting bracket B = With mounting bracket

Note 1: The material for the connection part is only available in phosphor bronze specification.
Note 2: For φ6 flare type connections, the product comes with a mounting bracket (body mounting foot).