YOUR PRESSURE AND TEMPERATURE SWITCH SOURCE MULTIFUNCTION PRESSURE AND TEMPERATURE SWITCHES • SINGLE SETPOINT, FIXED DEADBAND • SINGLE SETPOINT, ADJUSTABLE DEADBAND • DUAL SETPOINT BULLETIN SWGL-1 A Halliburton Company 13
PRODUCT INFORMATION Dresser Control Instrument Operation is a supplier of highly reliable Ashcroft® switches and controls for industrial and process applications. We stress total value to the customer. We begin with rock-solid designs, matching the most appropriate technology with the safety and reliability requirements of the applications. Materials of construction are specified to the exacting standards of Dresser Instrument Division, and product is built to last in the toughest applications.
The information in this catalog is offered as a guide to assist in making the proper selection of Ashcroft controls. Hermetically Sealed Switch We recommend hermetically sealed switch elements for improved reliability. The hermetically sealed Ashcroft® switch provides uncompromising contact protection in harsh or corrosive environments. It also satisfies requirements for installation in Division II hazardous areas.
G and L PRESSURE RANGES available for setpoints up to 1000 psi for maximum reliability. This design is available in 316 SS or Monel. Differential pressure models use a unique dual-diaphragmsealed piston design that features very high static operating pressures and small size. Pressure and Differential Pressure Switches G- and L-Series pressure, differential pressure and vacuum switches use two different actuators depending on setpoint requirements.
G and L SERIES PRESSURE SWITCH AND DIFFERENTIAL PRESSURE SWITCH ORDERING INFORMATION 1 2 3 G P D N 4 1 – FUNCTION 4 5 6 G G B 2 5 X K 3 30 PSI NOTES: 5 – PRESSURE CONNECTION(1) GPS/LPS - Pressure control, single setpoint, fixed deadband. GPA/LPA - Pressure control, single setpoint, adjustable deadband. GPD/LPD - Pressure control, two independently adjustable setpoints, fixed deadband. GDS/LDS - Differential pressure control, single setpoint, fixed deadband.
G and L TEMPERATURE SWITCHES Temperature Switches Thermowells G- and L-Series temperature switches feature a SAMA Class II vapor pressure thermal system. This system provides quick, accurate response to process temperature changes with negligible ambient temperature effects. This is inherent in the design due to the precise relationship between temperature and pressure according to the vapor pressure laws. A wide selection of sensing bulb and armored capillary lengths are available.
G and L TEMPERATURE SWITCH ORDERING INFORMATION 1 2 3 4 G T A N 4 H 0 5 1 – FUNCTION CODE GTS/LTS GTA/LTA GTD/LTD 6 Code Order Code Line Length ft Style Temperature Control, Single Setpoint, Adjustable Deadband 00 Not Applicable Rigid REMOTE MOUNT 05 10 15 20 25 5 10 15 20 25 Capillary with Armor (Std.
SWITCH SELECTION INFORMATION Enclosure Cover PRESSURE, TEMPERATURE AND DIFFERENTIAL PRESSURE SWITCH SELECTION Before making your selection, please consider the following: Cover Gasket 1. Actuator The actuator responds to changes in pressure, temperature or differential pressure and operates the switch element in response to these changes. The actuator is normally exposed to process fluid and must therefore be chemically compatible with it.
SWITCH SELECTION INFORMATION Accuracy – (See repeatability). Accuracy normally refers to conformity of an indicated value to an accepted standard value. There is no indication in switch products; thus, instead, the term repeatability is used as the key performance measure. Automatic Reset Switch – Switch which returns to normal state when the actuating variable (pressure or temperature) is reduced.
DIMENSIONS – G-SERIES ENCLOSURE Pressure Switch – psi Ranges Pressure Switch – Inches Of Water Ranges 2.7 lb. 1.2 kg Differential Pressure Switch – psi Differential Ranges 3.6 lb. 1.6 kg Differential Pressure Switch – Inches Of Water Ranges 4.5 lb. 2.0 kg Temperature Switch – Direct Mount 3.8 lb. 1.7 kg Temperature Switch – Remote Mount 3.7 lb. 1.7 kg 10 Dimensions in ( ) are millimeters 4.5 lb. 2.
DIMENSIONS – L-SERIES ENCLOSURE Pressure Switch – psi Ranges Pressure Switch – Inches Of Water Ranges 2.7 lb. 1.2 kg Differential Pressure Switch – psi Differential Ranges 3.6 lb. 1.6 kg Differential Pressure Switch – Inches Of Water Ranges 4.5 lb. 2.0 kg Temperature Switch – Direct Mount 3.8 lb. 1.7 kg Temperature Switch – Remote Mount 3.7 lb. 1.7 kg Dimensions in ( ) are millimeters 4.5 lb. 2.
Instrument Division Sales and Customer Service Locations U.S. Headquarters International Headquarters Control Instrument Operation Milford, Connecticut 210 Old Gate Lane Milford, CT 06460 Tel: (203) 878-5641 FAX: (203) 878-8519 Stratford, Connecticut 250 E. Main Street Stratford, CT 06614-5245 Tel: (203) 378-8281 FAX: (203) 385-0357 International Operations U.S. Sales Offices Chicago, Illinois 400 W.
