SOGEVAC Rotary Disc Pump Maintenance Guide

2.6 RS 485 interface and predictive maintenance (FC model)

SV 40 BI FC, SV 65 BI FC, and SV 120 BI FC are equipped with RS 485 interfaces, which can achieve:

Read the operating hours of the pump

Monitor motor power and drive temperature

Remote start/stop

Adjust the pump speed (50%~100%)

These data can be used for predictive maintenance, arranging repairs before faults occur, and avoiding unplanned downtime.

Installation and electrical connection

3.1 Mechanical Installation

Location: The pump should be installed on a horizontal and sturdy surface, ensuring good ventilation at the bottom.

Connection: The intake and exhaust ports are ISO-KF flanges (DN 25, DN 40, or DN 50). Use appropriate centering rings and clamps. For the exhaust port, a 1/2 "hose barbed connector (some models) can be used.

Mobile: The SV 120 BI FC is equipped with wheels and foldable handles, making it easy for a single person to move around.

3.2 Electrical Connections

Power supply: Check the voltage and frequency on the nameplate. Single phase wide range models (200-240 V) can be directly plugged into standard sockets. Attention: The FC model has an internal frequency converter and a starting current limit, so no special circuit breaker is required.

Grounding: It must be reliably grounded (through the power line grounding terminal).

RS 485 wiring (FC model): Use shielded twisted pair to connect to the RS 485 port of the controller. For details of the agreement, please consult Leybold.

3.3 Initial startup

All pumps have been filled with an appropriate amount of oil and tested before leaving the factory. Before the first startup:

Check the oil level (through the oil sight glass), which should be between the maximum and minimum markings.

Ensure that the air intake is connected to the system or blocked.

Start by tapping and confirm the direction of rotation (three-phase motors need to check the phase sequence, single-phase motors do not need to).

After running for 1-2 minutes, check if there is oil mist at the exhaust port (normally it should be very rare).

Maintenance and oil selection

4.1 Oil type

Applicable scenarios for oil product models

LVO 700 synthetic cyclic hydrocarbon oil LC/GC-MS, general vacuum, high antioxidant activity, long life

LVO 420 PFPE (perfluoropolyether) ICP-MS, corrosive gas, strong oxidizing environment

Important notice: PFPE oil (LVO 420) can only be used for pumps specifically designed to use this oil (such as FC models labeled with PFPE). Mixing mineral oil and PFPE can cause seal damage and pump failure.

4.2 Maintenance cycle

Standard application: Replace oil and exhaust filters every 12 months or 8000 hours.

LC/GC-MS: LVO 700 can achieve an oil change cycle of 24000 hours (3 years).

FC model: Read operating hours through RS 485 and schedule maintenance according to actual load.

4.3 Daily Inspection

Check the oil level weekly and replenish it when it falls below the minimum line.

Check the exhaust outlet monthly for obvious oil mist (if so, it indicates that the exhaust filter may be clogged or damaged).

Clean the exterior of the pump body and fan cover every quarter to ensure good heat dissipation.

4.4 Oil Change Procedure

The pump runs until it is warm (which helps the oil flow out), and then stops.

Open the air inlet to release air to atmospheric pressure.

Place an oil pan under the exhaust port.

Remove the drain plug (or use the included drain hose) and drain the old oil into a container.

Replace the exhaust filter (if necessary).

Tighten the oil drain plug and inject new oil from the filling port to the correct level.

Start the pump and run it for a few minutes, then check the oil level again.

Common troubleshooting

The following troubleshooting guide is based on typical failure modes of SOGEVAC pumps.

5.1 Pump does not start or trips immediately

Possible cause inspection and resolution

Check the nameplate voltage if the power supply voltage does not match, and confirm that it is consistent with the power grid

Motor overload relay tripping (FC model external fuse or circuit breaker), resetting circuit breaker or replacing fuse; Check if the pump is stuck

Check the oil level and drain excess oil if there is too much oil accumulation or high oil viscosity in the pump; Using low-temperature oil in cold environments

Measure the resistance of the motor winding when it burns out; If there is a short circuit or open circuit, the motor or the entire pump needs to be replaced

Observe the LED status of the FC model frequency converter for faults; Power off and restart; If the problem persists, contact maintenance

5.2 Insufficient pumping speed or high ultimate pressure

Possible cause inspection and resolution

Check and clean the air inlet filter or pipeline blockage

Fill the oil level to the correct level if it is too low

Oil aging or contamination (black or emulsified oil), replace oil and exhaust filters

Exhaust filter clogged, replace filter

The gas damper is not closed (when low limit pressure is required). Close the gas damper

Check if the valve disc is stuck when the anti backflow valve is not fully opened

Internal wear of the pump (blades, cylinder body) requires major repair or replacement