820B | Bronze Centrifugal Close Coupled Pump

• Bronze Construction:
  Ensures durability and resistance to corrosion, extending the pump's lifespan and reducing maintenance costs. 

• Stainless Steel Shaft:
  Provides strength and reliability, minimizing the risk of mechanical failure and ensuring consistent performance. 

• Carbon Face Mechanical Pump Seals - Buna STD:
  Standard seals suitable for general use, with options for Viton® or Teflon® seals for handling more aggressive solvents and chemicals. 

• Field Convertible to Pedestal Drive Model:
  Offers flexibility in installation, allowing the pump to be adapted to different setups and applications. 

• Handles Contaminated Liquids:
  Capable of pumping liquids with small solids or abrasives, making it suitable for challenging environments. 

• Extremely Quiet Operation:
  Minimizes noise, making it ideal for use in noise-sensitive areas such as residential or commercial buildings. 

• Easy Field Mounting:
  Pump-heads can be easily mounted to standard footless “C” flange motors, simplifying installation and maintenance. 

• Keyless Impeller Option (820B-07):
  Simplifies maintenance and reduces downtime, ensuring continuous operation. 

• O-Ring Housing Seal:
  Eliminates gasket problems, providing a reliable and leak-free seal. 

DRIVE

This close-coupled pump uses a standard NEMA 56C motor with no base. Single phase motors are non-reversible and are wired for the proper pump rotation which is counter-clockwise looking at inlet end of pump. See the dimensional drawing. Three phase motors must be checked out for proper rotation when pump is installed. Interchanging of any 2 wires in a 3-phase system will reverse motor rotation.

LIQUIDS & TEMPERATURES

The special pump alloys used provide corrosion resistance to many liquids including water, water solutions, and a wide range of commercial chemicals. Questions as to the chemical compatibility of special liquids should be referred to the factory.

Viscous liquids with a maximum viscosity of 2000 Saybolt Seconds Universal can be pumped. However, when pumping viscous liquids as compared with water, a reduction in flow and pressure occurs and the required horsepower rate increases.

Liquids heavier than water require additional horsepower in direct proportion to the increase in specific gravity. Liquids contaminated with small solids or abrasives can be handled, but a reduction in mechanical seal life must be expected. The pump uses a mechanical type shaft seal with a Nitrile rubber element. It is suitable for water, oils, and some mild solvents and it is limited to 212°F. Fluoroelastomer seals and Polytetrafluoroethylene (PTFE) seals are available for severe solvents, difficult chemicals, and elevated temperatures.

SUCTION LIFT

These centrifugal pumps are not self-priming. They must be installed below the liquid level so that the liquid flows to the pump by gravity (flooded suction). However, if a foot valve is used at the beginning of the suction line, and all air is bled from the pump by manual priming, the pump will lift on the suction side up to 15 feet. Such a system relies entirely on the non-leaking foot valve for starting capability.