SOGEVAC Rotary Disc Pump Maintenance Guide

5.3 Abnormal increase in noise or severe vibration

Possible cause inspection and resolution

The pump base is not fixed or loose, and the installation bolts are tightened

Rigid connection of intake or exhaust pipes causes resonance, and flexible connection of corrugated pipes is used

If there are foreign objects or blade fragments inside the pump, stop immediately and disassemble for inspection

Bearing wear, replacement of bearings or entire pump

Loose motor fan cover or damaged fan blades, tighten or replace

5.4 Excessive oil mist at the exhaust port

Possible cause inspection and resolution

Drain excess oil to the normal oil level when the oil level is too high

Exhaust filter saturated or damaged, replace filter

Using the wrong type of oil (such as mineral oil for high loads), drain the old oil, clean the pump, and add the correct oil

Long term operation of the pump under high pressure (>10 mbar) leads to a large amount of oil carryover. Check for leaks in the front stage pipeline and reduce the intake pressure

5.5 Rapid increase in vacuum system pressure after pump shutdown (oil return)

Possible cause inspection and resolution

The anti backflow valve is not tightly sealed or stuck. Remove the inlet flange and check if the valve plate is intact; Clean or replace the valve disc

Stop the pump without releasing air (causing oil to be sucked into the system) and confirm that the automatic release function of the pump is normal (FC model can be set)

Excessive oil volume in the pump discharges excess oil

5.6 RS 485 communication failure (FC model)

Possible cause inspection and resolution

Check if the A/B wires are reversed due to wiring errors or poor contact; Ensure that the shielding layer is grounded at one end

Confirm that the baud rate of the controller and pump is consistent (usually 9600) due to a mismatch in baud rate

Address conflict: If there are multiple devices on the bus, ensure that the addresses are unique

Internal communication board fault of frequency converter, contact for repair

Precautions for replacing old pumps

When you need to replace a discontinued or irreparable rotary vane pump, the SOGEVAC DI/BI series is an ideal alternative. Please verify the following points:

6.1 Speed matching

The pumping speed of the new pump should not be lower than the rated pumping speed of the old pump. Attention: The pumping speed of SOGEVAC is measured under DIN 28 400 standard and may differ from other brands. For example, if an old pump has a nominal capacity of 20 m ³/h, SV 28 BI (25 m ³/h) can be used to obtain a surplus.

6.2 Flange dimensions

Old pump flange SOGEVAC corresponding model

DN 25 ISO-KF SV 16 DI, SV 28 BI, SV 40 BI FC (optional)

DN 40 ISO-KF SV 40 BI, SV 65 BI FC, SV 120 BI FC

DN 50 ISO-KF SV 120 BI FC (optional)

If the flanges do not match, variable diameter flanges or adapters can be used.

6.3 Power Compatibility

The old pump may use a three-phase 380 V or 220 V power supply. SOGEVAC offers a wide range of single-phase (200-240 V) and three-phase versions. If there is only a three-phase power supply on site, a three-phase motor version can be selected. The FC model uses a single-phase power supply, but the internal frequency converter can accept 180-264 V.

6.4 Installation Space

The external dimensions of SOGEVAC pumps (see manual dimension diagram) are usually more compact than similar pumps. Before replacing, measure the installation space of the old pump to ensure that the new pump can fit in. Especially since the SV 120 BI FC has a large size (733 × 470 × 483 mm), sufficient space needs to be reserved.

6.5 Exhaust interface

The exhaust port of the old pump may be a threaded joint or flange. SOGEVAC offers ISO-KF flange or 1/2 "hose barbed connectors. Use adapters or custom tubing.

6.6 Oil Products

If the old pump uses PFPE oil (such as Fomblin), the PFPE version of SOGEVAC (such as the LVO 420 model of SV 40 BI FC) must be selected. Ordinary SOGEVAC cannot be directly filled with PFPE oil because the seals are incompatible.

6.7 Control Integration

If the old pump has remote control function (such as starting and stopping through PLC), the RS 485 interface of SOGEVAC FC model can provide similar or even stronger functions. Non FC models can only control motor start and stop through contactors.

Accessories and upgrade options

7.1 Mobile Base Frame

Suitable for pumps with a pumping speed ≤ 120 m ³/h

Equipped with an oil pan that can hold up to 2 liters of leaked oil

Universal casters (two with brakes)

Easy to move and maintain

7.2 Noise Enclosure

Can further reduce by about 5 dB (A)

Open design on both sides to ensure heat dissipation

Can be used in combination with a mobile base

7.3 Power Cords

Leybold offers a variety of power cords suitable for sockets in different countries:

European standard Schuko (16A)

British Standard (13A)

American standard NEMA 6-15P/5-15P

Switzerland, IEC 309, etc

The length ranges from 1.8 meters to 5 meters

7.4 Oil Product (LEYBONOL)

LVO 700:1 liter bottle (L700 01), suitable for most analytical instruments.

LVO 420:1 liter bottle (L420 01), PFPE version only.