Ashcroft B-Series NEMA 7/9 Pressure Switch
Ashcroft B-Series NEMA 7/9 pressure switches are designed for pressure control in virtually all industry and OEM applications and is used throughout general process and industrial markets globally due to the switch’s reliability, performance and safety.
The Ashcroft B-Series pressure switch has been designed to be customised as an ideal solution for this type of pressure measurement.
Ashcroft B-Series NEMA 7/9 Pressure Switch – Applications
- Offshore oil rigs
- Chemical and petrochemical plants
- Pulp and papermills
- Steel mills
- Power plants
- Water and sewage-treatment plants
- Other corrosive environments
The Ashcroft B-Series pressure switch should ideally be used in temperatures ranging from –19 to +65°C.
Ashcroft B-Series NEMA 7/9 Pressure Switch – Features
- Adjustable setpoints 15-100% of range
- Fixed or limited adjustable deadband
- Wide selection of switch elements
- Explosion proof enclosure provides uncompromising protection
- Special designs for NACE & fire applications
- SIL 3 Capable (B and D series only)
Ashcroft B-Series NEMA 7/9 Pressure Switch – Product Specifications
| Ashcroft Model Number | Ashcroft B-Series NEMA 7/9 |
| Setpoint | Factory set or field adjustable |
| Setpoint Repeatability | ±1% of full range (Additional setpoint shift of ±1% of range per 50 °F from initial setpoint set at 70 °F typical) |
| Diaphragm | Buna N, Viton, Teflon, SS, Monel |
| Enclosure Material | Epoxy coated aluminum (standard) Optional: 316 stainless steel (NEMA 7/9 only) |
| Enclosure Rating | B4/Hydraulic: NEMA 4X, IP66 B7: NEMA 7/9, IP66 |
| Pressure Connection | 1⁄4 NPT Female (standard) Optional: 1⁄2 NPT Female , 1⁄4 NPT Female & 1⁄2 NPT Male combo |
| Electrical Output | SPDT or DPDT |
| Electrical Termination | 3⁄4 NPT Female (standard) Optional: 1⁄2 NPT Female |
| Ambient Temperature Range | –20°F to 150°F (–19 °C to 65 °C) All units calibrated at 70 °F |
| Process Temperature | 0 °F to 150 °F (Buna N or Teflon diaphragm) 20 °F to 300 °F (Viton diaphragm) 0°F to 300°F (SS or Monel diaphragm) |
| Pressure Ranges | Pressure: Vac-3000# Differential: 0-600#D Hydraulic: 1000-7500# |
| Approvals | UL E34743 (B4/D4), E38812 (B7/D7) CSA: 55541 ATEX: Sira 02ATEX1391X (B7/D7 with XCN) IECEx SIR 14.0077X FM: Limit Contol and Steam Limit Control |
ASHCROFT B-Series NEMA 7/9 – How To Order
Here is a typical ordering example for an Ashcroft B-Series NEMA 7/9 pressure switch – for technical support, specification and sales contact T&D.
Ashcroft Switch B4 20 B XPK 600#
- Enclosure : Pressure switch, Type 400, watertight enclosure meets NEMA 3, 4, 4X, 13 and IP66 requirements. (B4)
- Switch Element Selection – UL/CSA Listed SPDT : Narrow deadband ac, 15A – 125/250 Vac. Estimated dc rating, 0.4A, 120 Vdc (not UL listed). (20)
- Actuator Seal : Buna N (B)
- Options: Pilot Light(s) Top Mounted (XPK)
- Switch Range : 600 psi (600#)
Pressure Gauges – Ashcroft commercial gauges can be used to measure pressure on fire protection sprinkler pipework systems.
ASHCROFT
Watch how Ashcroft pressure gauges and temperature instruments protect people in all industries and every environment.
ASHCROFT & THE WATER INDUSTRY
Ashcroft gauges monitor pressure in filtration, flow and level applications including pumps, control systems, filters and heat exchangers – providing process pressure measurement for hydrostatic pressure, filter monitoring or regulating flow and deionized water.
T&D service the global water utility industry with Electrical, Mechanical, Process & Instrumentation Equipment – this includes Water Metering, Heat Tracing, Gas Detection and Process Heating. Image : Mott MacDonald
Hazardous Areas
Ashcroft B-Series NEMA 7/9 Pressure Switch – Data Sheet
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