Group: DRESSER FLOW CONTROL
Catalog excerpts
A-Series Miniature Watertight Pressure Switches Ashcroft® A-Series miniature pressure switches are designed for tough applications where conventional pressure switch designs often don't measure up. enclosure gives uncompromising protection over a wide temperature range for the most demanding applications. • Compact size • 316 stainless steel construction • Pressure ranges from vacuum • Field adjustable setpoint or • Wide operating temperature • Precision snap-acting micro switch element • SPDT or DPDT switching LOOK FOR THESE MARKS ON OUR PRODUCTS REGISTERED FIRM BULLETIN SW-AWT All specifications are subject to change without notice. All sales subject to standard terms and conditions. Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA email: ¡nfo@ashcroft.com • www.ashcroft.com
Open the catalog to page 1Applications include: Offshore oil rigs A rugged 316 SS enclosure gives uncompro- -where stainless steel construction and small size is desirable. mising protection. Materials of construction have been selected for long life. Precision snap acting Chemical and petrochemical plants -where small size and corrosion resistance construction is important. Pulp and paper mills micro switches are featured and fully encased to prevent moisture from corroding switch contacts. The switch, depending on range, is either an -where corrosion resistance and sealed contacts extend life. Special equipment...
Open the catalog to page 2A-Series Miniature Watertight Pressure Switches SELECTION GUIDE Before selecting a switch model the following The actuator responds to changes in pressure and operates the micro switch element in response to these changes. The actuator is normally exposed to the process media and must be chem- ically compatible with it. There are three types of actuators available for the A-Series switches - all welded 316 SS diaphragm sealed piston; 316 SS piston with Viton O-ring seal; and 316 SS piston with Buna-N O-ring seal. The 316 SS diaphragm is available in ranges from -15/15 psi to 200 psi. The...
Open the catalog to page 3AVAILABLE PRESSURE CONNECTIONS AVAILABLE ELECTRICAL CONNECTIONS 1/8 or1/4 MALE NPT 1/8 or1/4 FEMALE NPT 1/2 NPT CONDUIT CONNECTOR WITH 18 AWG WIRE LEADS VCR or VCO SPADE TERMINAL 4-0.187 MALE TERMINALS 7/16 ˝-20 SAE HIRSCHMANN MICRO-DIN CONNECTOR 43650 FORM C 3/4 ˝, 1.5˝ or 2.0˝ SANITARY ᕤ 18 AWG WIRE LEADS DPDT 18 AWG LEADS
Open the catalog to page 4A-Series Miniature Watertight Pressure Switches Factory set or field adjustable (Additional setpoint shift of ±2% of range per 40°F from initial setpoint set at 70°F typical) Stainless steel with Viton or Buna-N O-ring life piston life diaphragm design: >400,000 operations typical % NPTF, Y< NPTF, Y< NPTM, % NPTM. gold contacts available Wire leads, spade terminals or custom cables, % NPT conduit connec-tion with wire leads, Micro DIN with and without mating connector A SERIES SWITCH PERFORMANCE CHARACTERISTICS BURST PRESSURE Tri-Clover is a registered trademark of Alfa Laval Tri-Clamp is a...
Open the catalog to page 5X First three digits represent the length of the wire leads in inches. 012, 024, 048 & 072 are standard available lengths. Consult factory for custom length A-Series Part Number: 5 characters maximum representing setpoint of the switch in the same units as the range of the switch. For setpoints in Vacuum specify as "- "pressure. Rising Pressure (Increasing Pressure) Decreasing Pressure PRESSURE CONNECTION NOTES * Available with "S" activator only. SETPOINT NOTES If no setpoint is required on an APA switch use either "NSR" or "NSD." If direction Is not known OPTIONS NOTES The X character...
Open the catalog to page 6A-Series Miniature Watertight Pressure Switches ADDITIONAL SWITCH TERMINOLOGY 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 repeatabili- ty is used as the key performance measure. Ashcroft A-Series switch accuracy is 2% of nomi- Automatic Reset Switch - Switch which returns to normal state when actuating variable Pressure is Adjustable or Operating Range - That part of the nominal range over which the switch setpoint may be adjusted. Normally about...
Open the catalog to page 7FUNCTION CODE MICRO SWITCH PRESSURE CONNECTION GENERAL DIMENSION LOOK FOR THESE MARKS ON OUR PRODUCTS CONDUIT (XXXC) SPADE TERMINALS FIELD ADJUSTABLE WIRE LEAD (XXXL) CONNECTION WITH DUAL SWITCH SHOWN ADJUSTMENT COVER SLIDE COVER DOWN TO ACCESS SETPOINT ADJUSTMENT. SLIDE COVER UP TO CLOSE AND SEAL ADJUSTMENT REGISTERED FIRM BULLETIN SW-AWT All specifications are subject to change without notice. All sales subject to standard terms and conditions. Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA email: ¡nfo@ashcroft.com • www.ashcroft.com
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