Diaphragm Operated Pressure Switch

Visible Setpoint, Adjustable Deadband, Hermetically Sealed Snap Switch, Weatherproof and Explosion-proof

Weatherproof and Explosion-Proof in One Economical Enclosure

Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi (206 bar). The rolling diaphragm design maintains a constant effective area to minimize friction. This results in a minimum deadband as low as 5% of full scale. Since many applications require higher deadbands, the SA1100 includes a separate adjustment of this when necessary. A pump being used to control liquid level in a tank would be a typical situation where this feature would be important. Both setpoint and deadband adjustments are protected, yet clearly visible behind a clear polycarbonate window and are fully isolated from the electrical components for additional safety. A 7/16″ open-end wrench is the only tool required to change settings. Terminal blocks are provided for switch wiring connections and both internal and external ground screws are included. Standard housing is weatherproof to NEMA standards 1 through 4X and 13; explosion-proof to NEMA 7, Class I, Groups B, C & D; NEMA 9, Class II, Groups E, F & G. Optional construction adds drain to meet NEMA 3R IP54.

• Chemical, petroleum, food and drug processing industries. Used indoor, outdoor or in explosion-proof area.

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Dual-Action Explosion-Proof Pressure Switch

Explosion-proof and Weatherproof Housing

Explosion-proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The H2 is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The design consists of two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston actuates a separate switch independent of the other. The switches may be adjusted to operate together, at opposite ends of the range or at two intermediate set points. The threaded top is removed to field adjust or service switches without disturbing electrical or pressure connections. The Duotect® switch is explosion-proof and weatherproof. It can be mounted in any position and is not affected by vibration.

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Bourdon Tube Pressure Switch

Pressure Ranges to 8000 psi (551.6 bar)

Customers tell us that this is the best pressure switch made. The Mercoid D Series is one of the world’s broadest lines of pressure switches. Whatever your application might be, it is most probable it can be fully satisfied with a D Series pressure switch.

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Adjustable Pressure Switch

Vacuum and Pressure Ranges, 5A Switch, Compact Size

Miniature Series APS/AVS Adjustable Switches offer reliable switching for pressure/vacuum alarm, shutdown or control. The units are readily adjustable throughout their range using the locking adjusting ring and indicating pointer. The body is constructed of stainless steel for durability in harsh environments. Switches include 12″ (30 cm) wire leads sealed with epoxy for additional protection.

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Subminiature Pressure Switch

Field Adjustable, Submersible Models

Designed for OEM applications, the Series A2 is economical and is equipped with high proof pressure capabilities for demanding applications. The A2 is available with either spade terminals or flying leads (submersible). Switches with spade terminals can be easily adjusted in the field.

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Nöding PR20 Single Pressure Switch

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Nöding PR10 Single Pressure Switch

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Les pressostats sont destinés à permettre une surveillance de la pression sans indication locale mais avec contacts d’alarme. Les contacts permettent de définir une alarme haute ou une alarme basse ou autorisent une régulation entre deux seuils (gamme XML-A). Le contact est inclus dans un mécanisme qui vient se fixer directement sur le séparateur de manomètre MDM 900 (Voir DOC 903/1) qui assurera la transmission de pression afin de le protéger de la corrosion due aux produits agressifs (bases ou acides). La valeur du contact du pressostat XML-A, est réglable de l’extérieur par une vis à actionner à l’aide d’un tournevis cruciforme et d’une fenêtre d’indication qui permet l’approche du réglage, alors que le pressostat KPI, possède un deuxième réglage qui permet de régler le différentiel de pression entre l’ouverture et la fermeture. L’ensemble pressostat / manomètre peut être installé dans toutes les positions.

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