Howden Roots Air Blower URAI 36

Install a substantial screen of 16 mesh backed with hardware cloth at or near inlet connections

Make provisions to clean the screen of collected debris after a few hours of operation

Remove the screen when its usefulness has ended to prevent wire deterioration

Stop the blower at the first opportunity to clean the temporary inlet protective screen

Check if an appreciable amount of debris has collected on the screen

Remove the screen if no appreciable amount of debris has collected

Lubrication — How to properly determine the oil service intervals

Check ambient temperature and discharge temperature

Determine oil viscosity grade based on temperature

Verify oil temperature does not exceed 195°F (90°C)

Use Roots synthetic oil of correct viscosity

Remove the breather plug (25) and the oil overflow plug (21)

Fill the reservoir up to the overflow hole

Ensure the reservoir is not overfilled

Lubrication — How to properly determine the oil service intervals

Determine the oil service intervals based on conditions

Select the correct oil viscosity grade based on conditions

Use Roots synthetic oil of correct viscosity per Table 2

Remove the breather plug (25) and the oil overflow plug (21)

Fill the reservoir up to the overflow hole

Ensure the reservoir is not overfilled

Place the breather and the overflow plug back into their respective holes

Lubrication — For Units with grease lubricated drive end

Verify applicable speed and operating hours

Use specified NLGI #2 premium grade aluminium complex grease, Roots P/N T20019002

Ensure no lithium based grease is used

Technical supplement for URAI-G Gas blowers — Lubrication

Check hydraulic pressure relief fittings for proper venting

Inspect restriction plug and metering orifice for proper function

Slowly force new lubricant into each drive end bearing housing until clean grease appears at relief fitting

Avoid using electric or pneumatic grease gun

Technical supplement for URAI-G Gas blowers — Precaution

Ensure care is used when opening the head plate seal vent chamber plugs (43)

Is the system under pressure or vacuum?

Check for gas leakage through the mechanical seals

Verify if gas leakage is escaping through the gear box vent or grease release fittings

Is the gas leakage undesirable?

Purge each seal chamber with an inert gas if leakage is undesirable

Ensure purge gas pressure is maintained one PSI above the discharge gas pressure

Check for gear end oil and drive end grease leakage into the gas stream