Atlas Copco 1830019445 Oil Stop Valve for Screw Compressors

Description

The 1830019445 is the Atlas Copco Oil Stop Valve, the valve that isolates the oil circuit of the machine when the compressor stops. A screw compressor spends a large part of its life at standstill, and what the oil does in those hours decides how clean the next start is. This valve is the part that keeps those hours quiet: it stops the oil from moving once the machine stops moving.

Small valves rarely get attention until they stop doing their work, yet the whole cleanliness of a restart sits on this one position. This article explains what the 1830019445 is, how the oil stop function fits into the machine, which record it replaces and how a renewal is planned and ordered.

Identity of the 1830019445 Oil Stop Valve

Valves of this size are ordered by part record, not by appearance, because several valve positions in a compressor look alike at a glance. The designation, the function and the part history of the 1830019445 together form its identity.

Designation and Part Record

The official listing names the part simply: Oil Stop Valve, under the part number 1830019445. The name describes the job rather than the shape, and that is why the valve is easy to plan around. It is a single sealed component, it travels as one piece, and the item data puts it at 8 × 5 × 5 cm and 0.20 kg, which is a pocket-sized spare rather than a heavy parcel to plan around.

The rate group of the item places it in the valve family of the parts programme, alongside the other control and isolation positions of the machine. For the maintenance planner this means the 1830019445 is entered as one standing line in the spares list, and the line stays valid because the number itself is the current version of the part.

The Supersedes Line: 1635538300 to 1830019445

The 1830019445 is the newest version of the following part number: 1635538300. That line is the whole history of the position, and it matters in two places. First, in the machine documentation: older manuals and older service records still carry the 1635538300, and a planner who meets that number in the paperwork should read it as the same valve position, renewed under the current number. Second, at the order desk: the order travels under 1830019445, and the parts system directs it there without any conversion work on your side.

Nothing about the machine changes with the supersession. The valve position stays what it is, the installation stays what it is, and the service records simply gain a line: the 1830019445 replaces the 1635538300 for every future renewal of this position. A plant that carries the old number in its maintenance system can add the current number next to it once, and both records point at the same valve from that day on.

What the Oil Stop Valve Does

An oil-lubricated circuit does not stop moving the moment the motor stops. Oil sits in the separator, in the lines and in the valve bodies of the machine, and pressure does not vanish instantly either. The oil stop valve is the part that controls what happens next, and the 1830019445 is that part.

Guarding the Circuit at Shutdown

When the machine runs, the oil system is a directed circuit: the oil is moved where the machine wants it, in the quantity the machine wants, and it returns through defined paths. When the machine stops, that direction ends, and the valve closes the circuit so the oil stays on its own side of the system. The 1830019445 therefore works at the exact moment the rest of the machine stops working, which is why its condition is easy to overlook.

The payoff is read at the next start. A circuit that was closed cleanly at shutdown holds no surprises: the oil is where it belongs, the compression unit starts without oil where oil should not be, and the machine reaches its normal operating picture without correction. A circuit that was not closed cleanly leaves traces instead, and those traces are what the maintenance team eventually finds in the machine’s records and on its surfaces.

What a Working Valve Restores

Renewing the valve with the 1830019445 restores the shutdown behaviour of the machine to the state it was designed for. The stop is clean, the standstill stays clean, and the start is a start rather than a recovery. Because the valve is a single sealed component, the renewal replaces the whole function in one step: there is no rebuild kit to plan, no internal parts to sort, and no second visit to finish the job. The maintenance file gains a simple line as well, because a single-component renewal is documented with the number of the part alone.

The renewal also protects the records of the plant. A machine whose valve positions are current and documented behaves the same way every day, and the people who operate it learn its normal picture. One deviating component changes that picture in small ways first, and the 1830019445 is the kind of part that removes the deviation before it becomes a trend.

Signs the Valve Position Needs Attention

The oil stop valve works at every stop, and it ages quietly, so its condition belongs on the inspection round rather than on the emergency list. The signs of a tired valve position are mostly read around the stops and starts of the machine.

Trends Worth Watching

Watch what the machine leaves behind at standstill: traces of oil where the machine stands, oil in positions that stay dry when the circuit closes correctly, or a start that begins less cleanly than it used to. Watch the stops as well: a machine that used to shut down quietly and now behaves differently at the moment of stopping is giving a hint about its isolation positions. Any one of these signs is a reason to inspect the valve and plan the renewal with the 1830019445.

None of these signs is dramatic on its own, and that is exactly why the valve is a planned part. The cost of the component is small, the swap is short, and the renewal is scheduled inside an ordinary service window. A valve position left alone does not stay small forever, because oil that moves where it should not moves on every single stop of the machine. Reading the signs early turns the renewal into a quiet line in the service plan instead of a note in the breakdown report.

Planning the Renewal

The 1830019445 arrives as one complete valve, so the planning is simple. The machine is stopped and made safe, the valve is exchanged as a unit, and the machine returns to service with its shutdown behaviour restored. At 0.20 kg the part is handled by hand, and the 8 × 5 × 5 cm box stores in the maintenance room as a standing spare without special conditions.

For a plant that runs several machines of the same family, the valve is also a practical fleet line. One part number covers the position wherever the machine record calls for it, and the 1830019445 can sit in the spares plan as a single line that serves the whole group. The supersession makes the fleet entry easier still, because the current number retires the 1635538300 from every list at once, and one clean-up of the records settles the naming for all machines.

Ordering the 1830019445 Through Seadweer

Valves are ordered by record rather than by look, because the valve positions of a machine can share a housing size while doing different jobs. The ordering routine of the 1830019445 is built around that fact.

Machine Record Check

Send Seadweer your compressor model and serial number, and the team checks the machine record against the 1830019445 before the quotation is issued. If your paperwork still shows the 1635538300, the check resolves it in the same pass: the old number and the current number describe the same valve position, and the order is confirmed under the current one.

What the Quotation Confirms

The quotation repeats the item data of the 1830019445: the designation, the box figures and the complete single-valve scope of the order. One confirmation covers the whole renewal, so the workshop can schedule the swap without waiting for a second item.

Technical Specifications

The tables below collect the identification and physical data of the 1830019445 in one place, exactly as the item data and the official listing state them.

Part Identification

Dimensions and Weight

The figures above are the item data of the 1830019445 for handling and logistics reference. The two tables together are the data sheet of the valve, and Seadweer repeats them with the quotation so the workshop knows what arrives before it arrives.

FAQ

What does the oil stop valve do?

It closes the oil circuit when the compressor stops, so the oil stays on its own side of the system during standstill. That is what keeps the next start clean and keeps oil out of positions where it should not be.

What is the difference between 1830019445 and 1635538300?

They are the same valve position. The 1635538300 is the number in older records, and the 1830019445 is the newest version of that part number. Orders travel under the current number, and no conversion work is needed on your side.

Which machines use the 1830019445?

The valve position follows the build of the machine rather than a visual match. Send your compressor model and serial number to Seadweer, and the fitment of the 1830019445 is confirmed against the machine record before the quotation.

How do I know the oil stop valve needs renewal?

Watch the stops and starts: oil traces at standstill, oil in positions that stay dry when the circuit closes correctly, or a start that is less clean than usual. Any of these signs is a reason to inspect the valve position and plan the renewal.

How big is the valve and what does the swap involve?

The item data lists 8 × 5 × 5 cm and 0.20 kg. The valve is exchanged as one complete unit with standard tools during a normal service window, and there is no rebuild kit to plan.

Why order by part number instead of by appearance?

Several valve positions in a compressor look alike while doing different jobs. The machine record decides which valve the position needs, and Seadweer checks the model and serial against the 1830019445 so the part that arrives is the part the machine was built around.

More Valves Available

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