Atlas Copco 2901145400 Thermostat Kit 40°C for Oil-Injected Screw Compressors

Description

The 2901145400 is the Atlas Copco Kit Thermostat 40°C for oil-injected screw compressors, the service kit that renews the thermostatic element of the machine’s oil temperature control valve together with its O-ring. The kit is listed in the official parts store as a component set of two items: the thermostat kit 40°C itself and one O-ring, which is everything the renewal of this valve position asks for.

Oil temperature control is one of those functions a screw compressor cannot run without, and the thermostatic element is the part that does the deciding. When it ages, the oil circuit loses its sense of direction: oil runs cold and carries moisture, or runs hot and loses its cooling margin. This article explains what the 2901145400 contains, what the 40°C grade means, how the thermostatic valve works in the oil circuit and when a renewal makes sense.

Identity of the 2901145400 Kit

Thermostat kits are small items with a large effect on the machine behind them, so the identity of the kit has to be exact before the order. The designation, the 40 C grade and the contents of the 2901145400 together settle that identity.

What the Kit Contains

The official parts store lists the 2901145400 as a two-component set: the thermostatic element of the 40°C grade and one O-ring. That pairing matches the work the renewal asks for. The element is the moving disc that steers the oil between the cooler and the bypass, and the O-ring renews the seal of the valve housing so the steered oil stays on the path the element chooses.

The kit arrives at 0.80 kg in a 15 × 10 × 10 cm box, which makes it a bench-top job at the machine rather than a lifting plan. A workshop with standard hand tools covers the swap during a normal service window, and the old element comes out through the valve cover without disturbing the surrounding oil circuit.

The designation of the 2901145400 also names the machine family it belongs to: the official listing reads Kit Thermostat 40°C for oil-injected screw compressors. That scope is the first filter of the order, and the machine record is the second, because service kit fitment follows the build of the machine. Together they make the identity of the kit a two-step confirmation that takes one message to Seadweer.

What the 40°C Grade Means

The 40 C in the designation is the temperature grade of the thermostatic element. The grade is what separates this kit from other thermostat kits in the same parts family, and it is the reason the order has to match the machine: a valve built around the 40°C grade expects an element of that grade, and the oil circuit of the machine is balanced around that working point.

For the buyer the practical rule is simple. The grade travels with the machine documentation, and the number of the kit in the parts book settles the choice. Seadweer checks the compressor model and serial against the 2901145400 before the order is confirmed, so the grade question is answered from the machine record instead of from guesswork.

What the Thermostatic Valve Does

An oil-injected screw compressor lives on its oil. The oil seals the clearances inside the element, carries away the heat of compression and lubricates the bearings, and it can only do those jobs inside a working temperature band. The thermostatic valve is the part that keeps the oil inside that band, and the 2901145400 keeps that valve working as designed.

A Temperature-Controlled Switch in the Oil Circuit

The valve sits between the oil circuit and the oil cooler, and the thermostatic element inside it works like a temperature-controlled switch. While the oil is still cold, the valve keeps it on a bypass so it warms up quickly to its working band. Once the oil reaches the working point, the element moves and directs the flow through the oil cooler, so the heat of compression leaves the circuit and the oil returns to the element at the right temperature. The 2901145400 renews the part that performs this steering.

The value of a healthy element shows in the machine’s readings. Oil that stays in its band keeps its lubricating strength, holds the water load of the circuit and protects the element and bearings from temperature stress. A worn element lets the balance drift, and the drift is exactly what the maintenance team sees in the oil temperature trend of the machine.

What a Renewed Valve Restores

The bypass side of the valve deserves the same attention as the cooler side. While the oil is cold, the bypass keeps the circuit short and the oil warm, which is what carries water out of the circuit instead of letting it settle. When the 2901145400 renews the element, both sides of the valve work return: the cold start warms the oil quickly, and the hot run sends the oil through the cooler at the right moment.

The 2901145400 also protects the parts around the valve. A fresh O-ring keeps the steered oil on the path the element chooses, so the cooler receives the full flow it was sized for and the bypass closes as designed. In this way one small kit restores the balance of the whole oil circuit, not only of the valve itself.

Renewal Signs and Service Timing

An oil-injected screw compressor cannot steer its oil temperature without a working element, so the condition of this small part belongs on every service checklist. The signs of an aging 2901145400 position are readable in the machine’s own records, long before the valve stops working altogether.

Trends Worth Watching

Watch for oil temperature that will not settle in its normal band: oil running hot points to an element stuck on the cooler path or a flow the valve no longer steers, and oil running cold keeps moisture in the circuit and shortens the life of the oil itself. Slow warm-up after a start, temperature swings with load changes and a visible valve that no longer moves freely all belong in the same picture. Any of these trends is a reason to inspect the valve and plan the renewal with the 2901145400.

Planning the Renewal

The thermostatic element is renewed as part of scheduled service work on many machines, and the kit format of the 2901145400 exists exactly for that: the element and its O-ring arrive together, so the valve is opened once and closed with fresh parts all around. The swap is short, the tools are standard, and the machine returns to service with its oil temperature control restored to the grade the machine was built with.

Because the kit is small, it is a practical item to hold in the spares plan of a plant that runs oil-injected screw machines. One line in the maintenance system covers the valve position, and the 2901145400 leaves the order desk as a complete renewal of that line.

The item data of the 2901145400 makes the spares entry precise: 0.80 kg in a 15 × 10 × 10 cm box that stores in the maintenance room without special conditions. The kit also suits fleet owners, because one part number covers the valve position across the machines that carry the 40 C grade in their parts books, and the 2901145400 can sit in the plan as a single standing line for the whole group.

Ordering the 2901145400 Through Seadweer

Thermostat kits are ordered by machine record rather than by visual match, because the elements of different grades look alike at a glance. The ordering routine of the 2901145400 is built around that fact.

Model and Serial Check

Send Seadweer your compressor model and serial number, and the team checks the machine record against the 2901145400 before the quotation is issued. The check confirms the kit, the 40°C grade and the fitment of the valve position in one pass, so the kit that arrives is the kit the machine was built around.

What the Quotation Confirms

The quotation repeats the item data of the 2901145400: the two kit components, the box figures and the origin of the item. The 2901145400 is quoted as the complete two-component kit, so the workshop can schedule the swap without a second order for the O-ring. One confirmation covers the whole valve renewal.

Technical Specifications

The tables below collect the identification and physical data of the 2901145400 in one place, exactly as the item data lists them.

Part Identification

Dimensions and Weight

The figures above are the item data of the 2901145400 for handling and logistics reference. The two tables together are the data sheet of the kit, and Seadweer repeats them with the quotation so the workshop knows what arrives before it arrives.

FAQ

What does the 2901145400 kit contain?

The official parts store lists two components: the thermostatic element of the 40 C grade and one O-ring. Together they are the complete renewal of the oil temperature control valve position on the machine.

What does the 40 C grade in the designation mean?

The 40 C grade is the temperature point of the thermostatic element, and the oil circuit of the machine is balanced around that working point. The grade travels with the machine documentation, and Seadweer checks it against your compressor model and serial before the order.

Which machines use the 2901145400?

The kit is listed for oil-injected screw compressors, and the 2901145400 follows the build of the machine rather than a visual match. Service kit fitment follows the machine build, so send your compressor model and serial number to Seadweer and the fitment is confirmed before the quotation.

How do I know the thermostatic element needs renewal?

Watch the oil temperature trend of the machine: oil running hot or cold of its normal band, slow warm-up after a start and swings with load changes all point at the valve. A visual check of the element during service settles it.

How big is the kit and what tools does the swap need?

The item data lists 15 × 10 × 10 cm and 0.80 kg. The swap is a bench-top job with standard hand tools during a normal service window.

Why renew the O-ring together with the element?

The O-ring seals the valve housing, and a reused seal can leak the steered oil past the path the new element chooses. The kit supplies both parts together so the valve is renewed in one opening.

More Thermostatics Available

Other Atlas Copco thermostatics are available upon request. Please check the table below or contact us for details.