1. Installation requirements for the Roots blower
1. The foundation must be firm with a level surface, raised 10–25 cm above the ground.
2. Leave enough space around the blower for inspection, maintenance and dismantling.
3. The working ambient temperature must not exceed 40 °C; if it does, take measures to cool the area, otherwise the blower's service life will be shortened.
4. When installed outdoors, provide a rain shelter.
2. Piping requirements
1. Piping must be tightly connected with no air leaks, and supported with brackets at suitable positions.
2. Pipe material must withstand the discharge temperature and pressure (preferably steel pipe).
3. Keep the inside of the piping clean and free of foreign objects.
4. Install a check valve on the piping to prevent high-pressure gas flowing back into the blower due to reverse rotation, which could destroy it. Note: the check valve must be installed on a horizontal section of pipe.
5. When several blowers run in parallel, each branch pipe must have a gate valve (so one blower can be isolated for maintenance).
6. Fit a bleeder (venting) valve on the piping to prevent starting under load — the blower should start unloaded, then the bleeder valve is gradually closed. When stopping after loaded operation, open the bleeder valve first to confirm the blower is unloaded, then shut it down.
3. Checks before starting
1. Check that anchor bolts and connections are secure.
2. Remove weld slag and other foreign matter from the piping.
3. Valves must be fully open, otherwise the blower runs overloaded and can be damaged.
4. Check and top up the gear oil. Gear oil is filled at the factory — check the oil level in the gearbox. With the machine stopped, fill to the centre of the oil sight glass; do not overfill, or oil will leak.
5. Grease the bearings. During normal operation, grease once or twice a week depending on actual conditions.
6. Check the tightness of the narrow V-belts and pulley alignment. Pulley alignment can be corrected with a straightedge. Belt tension should be adjusted according to the reference table; belts loosen after use and must be re-tensioned.
7. Check that the power supply voltage and frequency match the motor nameplate.
8. Check the pulley rotation direction — viewed from the pulley end, rotation must match the direction arrow.
9. Turn the pulley by hand before starting; if nothing is abnormal, start the blower.
4. Operating notes
1. During initial running, the viscous lubricant may cause higher noise and current; this disappears after 10–20 minutes of operation.
2. Air flow can be regulated by changing the blower speed or by adding/removing overflow piping.
3. Noise varies between units of the same model, depending on the position in the machine room and the piping arrangement.
4. The blower must operate within the pressure range stated on the nameplate in the manual.
The pressure gauge connects to the blower piping through a manifold cock. The gauge is suitable for measuring pressures of media that do not corrode steel and copper alloys. When measuring steady pressure, do not exceed 3/4 of the gauge's upper limit; when measuring fluctuating pressure, do not exceed 2/3 of the upper limit. Gauges in service must be checked regularly, at least once every three months.
The gauge is suitable for ambient temperatures of −40 °C to +60 °C and relative humidity not exceeding 80%. The gauge connection and the measuring point should be at the same level.
While the blower is running, the gauge cock must be in the closed position; cut open the rubber vent cap on top of the gauge before use. Open the cock only when measuring pressure, and close it again after measurement. A buffer structure is included to reduce the effect of impact, vibration and rapid changes in the measured medium.
Packaging: wooden case.
Jiangyin Zhongxin Machinery — one-stop aeration solutions.
Contact: +86 180 1341 8091 / +86 180 1341 8097 (WhatsApp / WeChat)
