What is a split shaft fire pump?

What is a split shaft fire pump?

Waterous split-shaft pumps provide fire industry professionals with easy-to-operate systems that offer the most efficient water delivery system on the market. Waterous split-shaft pumps have become the primary firefighting tools of fire departments around the globe.

How does a fire truck pump work?

Water enters the pump through an inlet, then goes into the center of an impeller spinning on a shaft. The water spins outwardly through the impeller vanes into a volute casing, which increases pressure. A centrifugal pump can draft from unpressurized water sources with help of a primer.

When should I pump in RPM mode?

The rpm mode will allow the pumper to continue to operate if a pressure sensor clogs or fails and will allow constant engine speed operation for certain types of equipment like some types of CAFS or other engine driven equipment that need a relatively fixed speed for best performance.

How do you start a fire engine pump?

First, the driver must engage the pump. To do this, the driver must use a button as seen in the picture. The driver must first place the button to neutral. Then the driver must place the button into pump then press the DRIVE button as if he were putting the truck into motion.

What is the difference between RPM and pressure mode?

In pressure mode the governor maintains a constant pump discharge pressure. The discharge pressure is monitored and compared to the selected pressure setting, the engine RPM is varied to keep the discharge pressure at the selected setting. In RPM mode the governor maintains a constant engine RPM.

How does a fire pump pressure relief valve work?

Pressure relief valves: Pressure relief valves are installed in a side outlet of the primary water path and regulate pressure by allowing a flow of water through the fire pump and pressure relief valve, thereby causing the fire pump to operate at a lower pressure on the fire pump curve.

What is a relief valve on a fire pump?

A Pressure Relief Valve is defined by NFPA 20 (3.3. 67.5 Relief Valve) as “A device that allows the diversion of liquid to limit excess pressure in a system.” In general, a PRV is a safety device, designed to protect a pressurized system during an overpressured event.

How does an air primer work on a fire pump?

Question: How does a priming system work? An electric vacuum priming pump is a positive displacement air pump. Activating the vacuum primer removes air from inside the suction and discharge casings of the fire pump. Removing air lowers the pressure inside the pump casing below atmospheric pressure.

When should you switch from pressure to volume?

Volume Mode should be used when pumping more than one-half the rated capacity of a pump. It should be used during defensive operations (i.e. Master Streams) and when drafting. TRANSITIONING BETWEEN PRESSURE AND VOLUME MODES – Typically, the mode should be set at the start of pumping operations before throttling up.

How does an automatic air release valve work?

Automatic air release valves are installed at the highest points in a pipeline where air naturally collects. Air bubbles enter the valve and displace the liquid inside, lowering the liquid level. When the level drops to where it no longer buoys the float, the float drops.

What is a pump and roll?

Walk-along pump-and-roll This application is where the firefighter walks alongside the apparatus while flowing a hand line. The key considerations for this operation are the ability: To maintain an apparatus road speed at or below 2 mph.

How long can you prime a fire pump?

NFPA 1901 recommends: “The time required to prime the pump shall not exceed 30 seconds if the rated capability is 1,250 gpm or less. The time to prime the pump shall not exceed 45 seconds if the rated capacity is 1,500 gpm or more.

Where can I find installation instructions for the Waterous shift unit?

installing your Waterous NOTE: Instructions subject to change without notice F-1031, Section 3030 (Rev. 1/31/20) Waterous Company 125 Hardman Avenue South, South St. Paul, Minnesota 55075 USA (651) 450-5000 www.waterousco.com Read through the installation instructions carefully before Shift Unit. F-1031, Section 3030 Page 2 of 26

What happens if you don’t install a pump shift control?

Failure to properly install the pump shift control and pump shift indicator system in the apparatus or failure to incorpo‐ rate in the Pump Operator’s Panel Engine Speed Interlock System may result in unexpected truck movement which may result in serious personal injury or death. Power Take-Off (PTO) Applications

How to troubleshoot pump problems?

In general, it can be stated that any troubleshooting exercise must be undertaken with an open mind and a principle desire to find a solution and fix the pump, not simply to assign blame. Excellent observation and communication skills are necessary in all such endeavors. Ross Mackay is an internationally renowned expert in pumping reliability.

What happens if you don’t install PTO shift control?

Failure to properly install the PTO shift control and PTO shift indicator system in the apparatus or failure to incorporate in the PTO Operator’s Panel Speed Control or Automatic Engine Speed Control system may result in unexpected truck movement which may result in serious personal injury or death. to Pump Water.