Order accessories for service units online

Order Accessories for Maintenance Units Online

Suitable accessories for compressed air filters, regulators, and lubricators ensure operational safety, reduce downtime, and extend the lifespan of components. This range includes mechanical fasteners, sealing elements, connection technology, and tools for assembly and maintenance. The focus is on precise dimensions, suitable materials, and connection compatibility with common maintenance units, so that spare parts not only fit but also deliver the required performance.

Materials and Designs: Selection According to Operating Conditions

Accessories for maintenance units are manufactured from various materials. Stainless steel (A2/A4) is standard when corrosion resistance and hygienic properties are required, for example, in the food or pharmaceutical industry. Aluminum offers high strength with low weight and is suitable for mounting brackets or holders in mobile systems. Plastics (PA, POM, PTFE) are used for non-load-bearing parts, insulation, and seals; PTFE and special elastomers (NBR, FKM) cover temperature and chemical requirements. For seals and O-rings, material-specific hardness grades and approvals (food, oil resistance) are crucial. Designs are standardized to ensure interchangeability. Mounting brackets are offered in L- or U-profiles, with elongated holes for adjustable mounting. Assembly wrenches exist as form-fitting variants for specific filter and regulator housings or as universal torque wrenches with adjustable values. Connection kits include straight and angled quick couplings, push-in fittings, and pipe fittings in various sizes (G, NPT, BSPP), as well as hose connections for 4/6/8/10 mm polyurethane or NBR hoses.

Connections, Seals, and Sealing Techniques

Correct connection selection is central. Threads should be combinable with sealing techniques that match the material and standard: PTFE wrapping for metallic threads, flat gaskets for knife-edge flange connections, or O-rings in screwed-in seat grooves. For delicate control valves, low-friction seals (PTFE-coated elastomers) are advantageous to avoid dead spots. For intake and vent openings, damped silencers with porous plastics or sintered metal inserts are common; these affect pressure loss and must be considered during design. Temperature and media compatibility require the correct elastomer choice: NBR for oil and air applications up to ~100 °C, FKM for higher temperatures and chemical resistance, EPDM for steam and certain acidic media. For powder-coated mounting plates, suitable screws and washers must be used to avoid stress cracks due to different thermal expansion.

Functional Accessories: Tools and Fasteners

Assembly wrenches, test probes, drain adapters, and torque tools are not consumables but part of the routine equipment in maintenance work. A precise assembly wrench prevents overtightening of housing covers, test probes enable leak tests on fine bores without damaging the screens. Mounting brackets with dovetail or quick-release systems allow tool-free disassembly during short maintenance cycles. In installations prone to vibration, self-locking screws and spring washers are standard to prevent loosening. Electrical aids such as sensor holders, cable glands, and pressure sensor adapters complement the mechanical accessories and allow the integration of monitoring functions. Pay attention to EMC-compliant shielding and suitable protection classes (IP67/IP69K) when sensors are mounted outdoors or in splash water zones.

Compatibility and Standards

Accessories must comply with standards and operating conditions. Pay attention to DIN, ISO, and EN markings for connection threads and fittings. RoHS and REACH conformity are mandatory for material selection and surface treatments. For potentially explosive areas, ATEX-certified components must be selected. Technical data sheets provide information on permissible operating pressures, temperature ranges, and permissible media; relevant limit values should be added rather than multiplied during planning to maintain safety margins.

Application-Oriented Practical Examples

Practical Example 1 – Assembly in a Production Line: In an assembly hall, the main air distributor was retrofitted with a combination set of stainless steel mounting brackets and a connection kit with BSPP threads. The brackets were positioned with elongated holes so that filter housings tilt forward, allowing element changes within five minutes. PTFE tape in two layers was used for sealing the threads to enable repeated unscrewing without leakage. Silicone washers could be installed for vibration damping. Practical Example 2 – Mobile Maintenance Unit for Service Vehicle: A service vehicle was equipped with a lightweight aluminum mounting frame, in which pressure regulators and oil mist lubricators were clamped as quick-change modules. The modules use quick couplings for 8 mm PU hoses and pre-assembled NBR O-rings with 70 Shore A. The couplings are dimensioned so that no pressure losses occur when uncoupling and no leaking oil enters the vehicle interior. Practical Example 3 – Corrosion-Resistant Installation in Humid Environment: For a packaging line in a refrigeration plant, all fasteners and connecting elements were chosen in A4 stainless steel. FKM seals ensured resistance to cleaning agents and temperature fluctuations. Sintered metal silencers were used at critical points to minimize moisture ingress while keeping the pressure drop low.

Inspection and Maintenance Measures

In the maintenance plan, accessories should be regularly checked for play, corrosion, cracks, and seal seating. Seals should be replaced according to time or operating hours; visual inspections are only partially sufficient, so pressure and leak tests are useful for validation. Torque values for screw connections must be documented; recurring checks prevent rework due to over- or undertightened connections. Accessories that serve as wear parts (quick couplings, O-rings, silencers) should be kept as spare stock items to minimize reaction times in case of malfunction.

Ordering, Storage, and Logistics

When ordering, ensure complete article data: material, thread type, nominal size, temperature and pressure rating, and any standard references. Store seals at controlled temperatures and protected from light, as UV exposure and ozone reduce elastomer lifespan. Stainless steel parts should be stored dry and decoupled to prevent surface changes due to galvanic effects. Clearly label spare parts with article numbers and application locations to avoid incorrect orders. For further technical information and specific application solutions, please visit our technology page https://maku-industrie.de/technik and our collection of real-world applications at https://maku-industrie.de/anwendungsbeispiele.

Important Selection Criteria at a Glance

* Material resistance for matching environment and medium, suitable seal types, standard and thread compatibility, as well as assembly and testing tools.

FAQs

1. Which seal is suitable for oil mist lubricators in compressed air systems? For oil mist lubricators, NBR O-rings with a hardness of approximately 70 Shore A are common, provided the operating temperature is below 100 °C and no aggressive additives are present. For higher temperatures or chemical exposure, FKM seals should be chosen. Pay attention to manufacturer specifications regarding compatibility with lubricants. 2. How do I determine the correct connection thread for my regulator? Check the manufacturer's specifications for the regulator for thread type and size (G, NPT, BSPP). Measure existing connection dimensions or refer to the technical drawing. Select accessories with identical standard dimensions and suitable sealing technology (PTFE wrapping, flat gasket, or O-ring) to prevent leaks. 3. Which assembly wrenches and tools are indispensable for maintenance units? Indispensable are a torque wrench with adjustable values for housing screw connections, specific manufacturer assembly wrenches for filter elements, and fine needle testers for leak tests. Additionally, quick coupling tools and a set of stainless steel fasteners (screws, washers, spring washers) are useful for performing repairs efficiently and reproducibly.