News

Advantage of Belt Driven Pump in Slurry Application:

• No need to change Pump / Motor when there is slight change or increase in
Head-Capacity requirements. This can be done easily by varying only the Pulley
ratio.

• Pump & Motor do not get damaged when line is choked or Pump is clogged
especially in slurry / high sp. gr liquid applications.
• Very common and easy to install
• Larger pulleys prevent slippage better
• To prevent slippage:
– Motors ½ Hp or less, use at least a 2” diameter pulley
– Motors larger than ½ Hp, use a 3” diameter pulley
• Most popular drive used with electric motors
• Advantages:
– Motor may be mounted on or close to machine
– Less tension is needed on the belt
– Belt stays on pulley better
• Very common on cooling fans and squirrel-cage blowers
• Three sizes:
– FHP:
• suited for pulleys 2½” and less in diameter, on motors of less than
1 Hp
• Thinner & more flexible than other V-belts
– A-Section:
• Heavier and can be used on small pulleys
• More slippage than the thinner belt
• Stiffness of belt prevents it from following curvature of pulleys
• Designed for pulleys 3” in diameter or larger, on motors from ¾ Hp
to 5 Hp
– B-Section:
• Designed for use on motors of 3 Hp or larger, with a motor pulley
5½” or larger in diameter
Webbed Multi-V-Belt
• Made up of two or more V-belts webbed together
• Main Advantages:
– Elimination of slippage
– Belt turnover
• Standard V-pulley:
– Used when only one speed is needed
• V-step pulley:
– Used for machine driven variable speeds
• Adjustable V-pulley:
– Also for variable speeds
– Diameter may be increased or decreased to adjust speed to desired rpm
Determining Length of a V-belt
• Mounted Motor:
– Loop a piece of string around and in grooves of pulleys
– Pull tight
– Tie knots in the ends
– Cut string
– Measure length
– Gives inside length of belt needed