Dwyer Instruments SERIES A9 Catalog Page

2-7/16

[62]

#8-32 SCREW

TERMINALS

ø1.500 [ø38.1]

2-5/16

[58.74]

ø1-1/2 [ø38.1]

[50.8]

ø1-1/2

[ø38.1]

1/4˝ NPT

Series

1-57/64

[48.02]

1-35/64

[39.29]

ø1-1/2

[ø38.10]

1-7/64

[28.18]

1/8 NPT

Snap-Action Pressure Switch

High Current Capacity, High Temperature Rating

Series A9 Pressure Switches are designed for controlling pressure with higher current capacity. These switches are used widely in steam cleaners, steam irons, and other pressure control systems. It provides SPDT contact and Series A9 Pressure Switches utilize highquality miniature snap-action switches. The switch is diaphragm operated, boasting a high temperature rating and compact size.

Model

Range psig (bar)

A9-1

2.9-8.7 (0.2-0.6)

A9-2

7.3-17.4 (0.5-1.5)

A9-3

14.5-36.3 (1.2-2.5)

A9-4

21.8-58 (1.5-4.0)

A9-5

29-87 (3.0-7.0)

A9-6

58-130.5 (5.0-9.0)

Deadband psig (bar)

2.9 ± 1.5 (0.2 ± 0.1)

3.6 ± 2.2 (0.25 ± 0.1)

5.1 ± 2.9 (0.35 ± 0.2)

8.7 ± 2.9 (0.6 ± 0.2)

Max Pressure psig (bar)

43.5 (3.0)

58.0 (4.0)

72.5 (5.0)

87.0 (6.0)

116.0 (8.0)

145.0 (10.0)

Temperature Limit

185°F (85°C) 257°F (125°C) 257°F (125°C) 257°F (125°C) 257°F (125°C) 257°F (125°C)

SPECIFICATIONS Service: Non-hazardous gas, liquid or

steam. Wetted Materials: Connection: Copper; Diaphragm: Silicone or SS (see model chart).

Temperature Limits: See model chart. Pressure Limit: See model chart. Repeatability: ± 5%.

Diaphragm Material

Silicone Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel

Switch Type: SPDT. Electrical Ratings: 21 A @ 125/250

VAC. Electrical Connections: 1/4˝ (6.35 mm) male quick connect.

Process Connection: 1/8˝ male NPT. Weight: 2.6 oz (75 g). Deadband: See model chart.