Atlas Copco 1622799081 Valve Assy Energy Recovery 40

Description

The 1622799081 is the energy recovery valve assembly for Atlas Copco compressors that run an Energy Recovery (ER) system. It is the thermostatic valve that sits in the oil circuit and controls how much hot oil reaches the recovery heat exchanger, so the heat of compression is captured and used instead of being lost in the oil cooler.

The assembly is ordered by its part record. A rebuild or a swap of the recovery circuit is planned around the number, and the 1622799081 is the line the planner carries when the valve has to be renewed.

What the 1622799081 Valve Assembly Is

The 1622799081 is a valve assembly rather than a single sealing element. It groups the thermostatic valve and its housing into one replaceable unit for the recovery side of the compressor oil circuit. Item data puts the assembly at 15 × 8 × 7 cm and 0.44 kg, a compact unit that fits at the oil filter housing of the machine.

Because the 1622799081 carries one standing number, the workshop matches it to the record it already holds, and the unit is the same whether the order is placed by code or by name. The number is the current version of the assembly, so a replacement ordered under it is the assembly the recovery circuit is set up to accept.

Designation and Part Record

The official listing names the part under the number 1622799081, with Valve Assy Energy Recovery 40 as the description of the item. The product group code is PMOA and the material group is S1. Those codes are the internal reference of the parts programme, and they are repeated here so the workshop can match the 1622799081 to the record it already holds.

The 40 in the description is part of the official item designation. The assembly is built for the recovery function of the oil circuit rather than for the standard cooling path alone, which is why the number is carried on its own line.

How the Energy Recovery System Works

An air compressor turns most of the electrical energy it draws into heat. In an oil-injected machine that heat leaves with the oil and the cooling water, and without recovery it is released to the surroundings. An Atlas Copco Energy Recovery system puts an oil and water heat exchanger into the oil circuit and hands the compression heat to water, which is then used for space heating, process water or sanitary purposes.

Recovering Compression Heat

In the recovery circuit the hot oil leaves the compressor element and passes through a heat exchanger, where the heat is handed to water. From there the oil returns to the machine and the water carries the recovered energy to the point of use. The 1622799081 keeps that path open whenever the oil is hot enough to give useful heat.

Official Atlas Copco energy recovery figures put the share of the electrical input that is turned into heat at most of the input, and the capture of that heat is the whole purpose of the recovery unit. The 1622799081 is the part that lets the circuit follow the temperature of the machine instead of running blind.

The Thermostatic Control

A thermostatic valve changes its opening with temperature. On a cold start the oil is cool and the recovery unit has little to offer, so the 1622799081 holds the oil on the short path and lets the machine warm up. As the oil temperature rises into the working band, the valve opens the line to the recovery heat exchanger and the heat is captured.

The compressor’s own thermostatic valve is set to open later, so the two valves do not fight each other. That offset keeps the recovered heat on the water side instead of letting it fall to the main oil cooler.

Where the 1622799081 Sits in the Oil Circuit

The valve sits in the oil line between the compressor element, the recovery heat exchanger and the main oil cooler. Its job is to split the oil flow between the two coolers of the circuit, and the 1622799081 is the part that steers the oil towards the recovery heat exchanger when the heat is wanted.

Oil Flow Between the Cooler and the Heat Exchanger

With recovery fitted, the oil first passes the recovery heat exchanger, which takes heat out for the water side, and then the main oil cooler, which trims the oil to the temperature the machine needs. The 1622799081 controls the first of those steps.

When the oil is below the opening band, the recovery line is closed and the oil goes straight to the main cooler, so the machine warms up quickly and no heat is taken by the water side. When the oil is hot, the valve opens the recovery line and the heat is handed to the water.

Two-Valve Control

The recovery circuit is controlled by two thermostatic valves, one tied to the recovery heat exchanger and one in the oil filter housing of the compressor. The 1622799081 is the recovery-side assembly.

The compressor-side valve opens at a higher temperature, and the official service instructions state that it is to open at least 10 °C later than the recovery valve. The 1622799081 is chosen with that offset in mind, which is why a general thermostatic valve is not a substitute for it.

Where the Recovered Heat Goes

The valve feeds a thermal load, and that load shapes how the recovery circuit is set up. The 1622799081 works the same way in each case; what changes is the water side the circuit is connected to.

Water Side and Duty

A recovery circuit is arranged either as a low temperature rise with high water flow, or as a high temperature rise with low water flow. The first suits large water volumes such as central heating in closed circuits, and the second suits smaller flows that reach a higher temperature, such as pre-heating of boiler feed water. In both arrangements the 1622799081 opens the recovery line once the oil is hot enough.

Because the compressor runs for long hours, the recovered heat is a steady supply rather than a peak load. The water inlet and outlet temperatures at the heat exchanger are the clearest sign of what the 1622799081 is doing, and they are read through the machine controller.

Why the Valve Assembly Matters

The recovered energy of a recovery system is set by the flow of hot oil that reaches the heat exchanger. If the valve does not open fully, the oil bypasses the recovery unit and the heat is lost in the main cooler. The 1622799081 decides how much of the available heat is captured.

Temperature Set Point and Stability

The valve opens within a fixed temperature band and reaches full open at the top of it. The band is chosen so the recovery unit is fed with oil hot enough to heat the water, while the compressor element still stays within its own thermal limit. The 1622799081 holds that balance through long runs, because its opening is set by the oil temperature and not by any controller setting.

The valve also protects the compressor. If the recovery circuit took too much heat, the oil would run cold and the machine would lose efficiency and risk condensation in the oil. The 1622799081 closes the recovery line when the oil is cool, so the working temperature is reached quickly and held afterwards.

Installation and Service Notes

The 1622799081 is fitted as a complete assembly, so the worn valve and its housing leave the circuit together and the new unit goes in as one part. Work is done with the compressor stopped and the oil circuit drained to the level the service procedure calls for.

Fitting and Verification

Before fitting, the mating surfaces are cleaned and the oil line is checked for debris, because dirt in the circuit is what jams a thermostatic valve in the first place. After the swap the circuit is filled and the machine is run up to working temperature so the new valve settles into its band. The temperature offset between the recovery valve and the compressor valve is confirmed during that first run.

Signals That the Valve Needs Attention

A drop in the water outlet temperature at the recovery unit, while the compressor itself runs on temperature, points to a valve that no longer opens fully. Internal sticking, debris on the seat and a tired thermostatic element all reduce the share of oil that reaches the heat exchanger. Because the valve works on temperature alone, its faults are quiet, and a check of the water temperatures during the normal service visit is enough to tell whether the 1622799081 is still doing its job.

Ordering the 1622799081 Through Seadweer

Recovery parts are ordered by record rather than by appearance, because two thermostatic valves of the same size can sit at different opening bands. The ordering routine of the 1622799081 is built around that fact.

Machine Record Check

Send Seadweer your compressor model and serial number, and the team checks the record against the 1622799081 before the quotation is issued. If your machine carries a related recovery part or a different valve band, the check resolves it in the same pass, and the order is confirmed under the current production record.

What the Quotation Confirms

The quotation repeats the item data of the 1622799081: the description, the box figures and the role of the assembly in the recovery oil circuit. The assembly is listed and ordered under the one number the order travels under.

Technical Specifications

The tables below collect the identification and physical data of the 1622799081 in one place, exactly as the item data and the official listing state them.

Part Identification

Dimensions and Weight

The two tables together are the data sheet of the 1622799081, and Seadweer repeats them with the quotation so the workshop knows what arrives before it arrives.

FAQ

What is the 1622799081?

The 1622799081 is the Atlas Copco energy recovery valve assembly, the thermostatic valve that controls oil flow in the recovery circuit of a compressor. It routes hot oil to the recovery heat exchanger so the compression heat can be captured. The number is the line the planner carries on the parts record.

Which compressors use the 1622799081?

The assembly serves Atlas Copco compressors fitted with an Energy Recovery system, and the GA oil-injected range is the documented application in the official service literature. The machine record confirms the fitment, because the valve is tied to the recovery circuit rather than matched by appearance.

How does the 1622799081 differ from a standard thermostatic valve?

A standard thermostatic valve only manages the compressor’s own cooling circuit. The 1622799081 is set for the energy recovery side, where it opens earlier than the compressor valve so the heat goes to the recovery unit instead of the main oil cooler.

What happens if the valve no longer opens fully?

The oil bypasses the recovery heat exchanger, so the water side receives less heat while the compressor still runs on temperature. The recovery output drops without any obvious fault, which is why the water temperatures are checked at the service visit.

Why is the temperature offset between the two valves important?

The compressor valve has to open later than the recovery valve, and the official instructions set that offset at 10 °C or more. Without it, the recovered heat is dumped in the main oil cooler instead of being handed to the water. The 1622799081 is chosen to keep that order.

How do I order the 1622799081?

Send Seadweer your compressor model and serial number, and the team checks the record against 1622799081 before the quotation. If your paperwork shows a related recovery part, the check resolves it in the same pass, and the order is confirmed under the current production record.

More Valves Available

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