Limit switch boxes explained
BM Engineering Supplies can supply high quality manual valves fitted with actuated valves from world-leading automation technology and process control experts: Max-Air Technology. In this blog, we explore what a limit switch box is used for and talk you through some of our most popular products from the Max-Air range.
For more than 15 years, Max-Air Technology has engineered added flexibility and interchangeability features to their control and instrumentation products for the chemical, pharmaceutical, food and beverage, power, oil and gas, wastewater, and damper industries. One of their particular specialities lies in cutting edge limit switches, which is why we at BM Engineering Supplies readily recommend their innovative range of products.
The Max-Air 41 Series Technopolymer Limit Switch Box provides a new dimension in position indication for rotary actuators. Manufactured completely in technopolymer – with stainless steel fasteners and fully CSA/UL Listed, carrying a NEMA 4/4X rating – these compact lightweight limit switches are an excellent choice for most corrosive environments.
The operating position of the switches can be easily changed by manually adjusting the high-resolution spline cams, which are spring backed and therefore aren’t affected by normal vibration. Despite a compact design, MAX-AIR switch boxes are easy to wire up with plenty of room to bring wires into the enclosure. As standard, each unit has two 1/2-inch NPT conduit entries, and a terminal strip which is angled to allow for easily attaching external wires.
MAX-AIR switch box has a compact construction, minimizing valve package envelope size. While its high-visibility indicator offers clear location of the current valve position. Various configurations include two mechanical micro switches or different types of proximity sensors.
A technopolymer mounting bracket is supplied as standard and fits NAMUR top-mounting hole spacing 80mm x 30mm. The bracket allows the use of standard NAMUR stem height of 30mm, and 20mm with a coupling included in the standard kit.
Max-Air 45 Series aluminium and stainless steel series
The Max-Air Technology aluminium and stainless steel limit switch box is setting a new standard for compact limit switches. The Max-Air 45 Series aluminium and stainless steel series limit switch boxes are an extremely reliable, robust, and time tested solution for your position monitoring needs. Switches are available with mechanical, proximity and inductive switch types, and are fully certified to North American and European standards.
MS45 and PS45 Series are equipped as standard with two conduit entries 1/2” NPT and one 8-point angled terminal strip to allow for easy wiring. Both also come with a high-visibility beacon, offering clear location of the current valve position as standard.
The switch box also comes with stainless steel captive cover bolts and NAMUR 80mm x 30mm H30 stainless steel bracket with stainless steel fastening hardware for ease in mounting the switch box onto the actuator. They can be mounted on NAMUR H20 actuators through a technopolymer coupling.
Like the 41 Series, quick set cams can be easily changed by adjusting the high-resolution spline cams manually and independently without need for additional tools. Spring-backed cams and compact construction also come as standard.
Max-Air 48 Series Explosion Proof aluminium and stainless steel series
The Max-Air 48 Series Explosion Proof aluminium and stainless steel series limit switch boxes are available for the highest level of safety when installations involve hazardous environments, including very difficult applications such as hydrogen and acetylene.
Extremely reliable, robust, and time tested, the 48 Series is an excellent solution for your position monitoring needs. These switches are also available with mechanical, proximity and inductive types, and are fully certified to North American and European standards.
Speak to one of BME’s knowledgeable advisers about your limit switch box requirements today by calling 0141 762 0657 or email sales@bmengineering.co.uk. For more information please visit www.bmengineering.co.uk.test.
