HHE 2022-2023

111166 Three MASTER PNEUMATIC PRODUCT RANGE GENERAL PURPOSE FILTERS General purpose, compressed air filters remove water and particulate material from the air stream to protect downstream equipment from contamination. As air enters the filter, internal baffles create a swirling motion to the air, meaning entrained dirt and liquids are thrown against the sides of the filter bowl and then fall to the sump area at the bottom of the bowl. Additional baffling keeps the air in the sump area relatively quiet; this ensures that the removed material is not returned to the air flow going to the filter element. The filter element will then collect smaller particles. COALESCENT FILTERS A 0.3μm rated coalescing filter element is standard in all coalescing units. They remove 99.99% of oil and solid contaminants larger than 0.3μm. An optional 0.01μm rated element provides extremely fine filtration, but at some reduction in air flow. However, in Series 380 and Vanguard filters, extended bowls with higher capacity coalescing elements are available, which allow significantly increased air flows. ADSORBER FILTERS The adsorbing filters are designed to remove vapours from the air line that cannot be removed by a coalescing filter. They produce air that is virtually free of oil and hydrocarbons, as required by industries, such as food processing, electronics and instrumentation. The filter cartridges contain activated carbon to adsorb hydrocarbon vapours and odours from alcohols, esters and ketones. An optional extended bowl includes a higher capacity adsorbing cartridge, which allows as much as 50 per cent greater airflow. ULTRA CLEAN FILTER ASSEMBLIES These assemblies consist of three filters: a general purpose filter, a coalescing filter and an adsorbing filter. The general purpose filter removes gross contaminants, while the coalescing filter removes oil mists, aerosols and minute particles. Finally, the adsorbing filter virtually eliminates odours from freons, alcohols, esters, ketones and up to 99% of most hydrocarbons. PRESSURE REGULATORS Design parameters, that reflect a “blend” of performance characteristics to best meet the needs of industry, are found in the many series of pressure regulators that Master Pneumatic offers. Air flow, accuracy of pressure settings, variations in air flow and supply pressure, regulated pressure ranges, response time, repeatability, sensitivity and relief capacity, physical size and cost were all major considerations in their design. Pilot operated regulators are available for applications where hands on is not possible or where there are safety issues. SEMI-PRECISION PRESSURE REGULATORS Recommended on applications where “near-instrument quality” pressure control is required at a relatively low cost. A large diaphragm area allows greater sensitivity and adjustment resolution than available with standard miniature pressure regulators. A smaller valve seat results in greater precision and less regulated pressure variation with variations in supply pressure. AIR-LINE LUBRICATORS Master Pneumatic manufacture both wick feed and sight feed lubricators. Each design has unique operating principles, benefits and features. In a wick feed lubricator, a porous bronze wick is saturated with oil by capillary attraction. Oil is stripped off the wick by air flow in a constant oil-to-air ratio. The design is essentially self-adjusting, however oil delivery can also be varied by manual adjustment. Units will not shut off or clog, even with dirt and moisture in the reservoir. In the sight feed lubricator, air flows through an automatic flow sensor, which creates a slight pressure differential between the air passage and the oil reservoir. This causes oil to move up a riser tube, through the adjustable metering valve and to drip into a transparent nylon sight feed dome. Sight feed lubricators are easy to adjust, visibly show how much oil is being dispensed and can be filled under pressure. The adjusting knob can be removed to make the lubricator “tamper resistant”. All working parts are in an easily replaceable cartridge. For precision lubrication, refer to the SERV-OIL lubrication section. RELIEF VALVES Relief valves are set for a desired maximum system pressure and inserted in a tee, downstream of regulated pressure, to prevent over-pressurisation of the system beyond the relief valve setting. If the pressure exceeds the relief valve setting, it will dump system air to atmosphere. INTEGRAL FILTER / REGULATORS These units have essentially the same performance characteristics and features of individual filters and regulators but provide economy of size and a lower cost. They are particularly useful where horizontal space is limited.