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The GW…A4/2 HP pressure switch is an adjustable pressure switch for automatic gas burning equipment controls. It is suitable for closing, opening or switching over a current circuit when the actual pressure value deviates from the specified pressure setpoint. The specified pressure setpoint (operating point) is set at a setting wheel using a scale.

Pressure monitoring in control systems suitable for gaseous fuels and other neutral gaseous media as well as air, flue gases and products of combustion. Contacts are Silver, gold-plated (Au). This switch has Stainless Steel membrane and viton seals for compatibility for gases up to 1% H2S (Digester / Landfill)

Die cast zinc, powder coated 1/4″ NPT pipe mount, screw terminals with M20x1.5 cable gland. Special gas rated up to 1.0% by volume H2S wet

Specifications:

• Max. operating pressure:2-8 barg (gas)(30-115 Psig). Setpoint range 0.1 to 6 barg (40-2400″wc).
• Enclosure Rating:IP65 (NEMA 4)
• Ambient Temperature Rating:15C to +70C (5F to 158F)
• Contacts Ratings:
• 24-250VAC 20mA – 3Amps
• 5-48VDC 5mA-1amp
• Note: After use with more than 24VDC/20mA, rating becomes 24VDC/20mA

Model pmax. bar [PSI] Order No. Adjusting range bar [PSI] Switching hysteresis p bar [PSI] GW 500 A4/2 HP SGS 2 @ 0.1 – 0.15
[29 @1.5 – 2.0]
5 @ 0.15 – 0.5
[72.5 @ 2.0 – 7.0] 273274 0.1 – 0.5
[1.5 – 7.0]
(40-200″wc) 0.03 [0.5] GW 2000 A4/2 HP SGS 5 [75] 273275 0.4 – 2.0
[6 – 30]
(160-800″wc) 0.05 @ 0.4 – 1
[0.05 @ 6 – 15]
0.1 @ > 1 – 2
[1.5 @ 15 – 30] GW 6000 A4/2 HP SGS 8 [120] 255571 1.0 – 6.0
[15 – 85]
(400-2400″wc) 0.3 [4.5]

Also See:

• Dungs GAO High or Low Pressure Switch
• Dungs GGAO High or Low Pressure Switch with Gold Contacts
• Dungs GMH High Pressure Switch
• Dungs GML High Pressure Switch
• Dungs AA-A2 Differential Pressure Switch

Resources:

• Dungs GW A4/2 HP SGS Gas Pressure Switch for up to 120 PSI and Special GasesTechnical Literature and Instructions

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