Franklin FPS 3A TriSeal multistage bore pumps supply bore water with minimal sand or sediment for domestic water supply, irrigation and pressure boosting. At 45L/min, these models deliver approximately 25-315m head, depending on model. Two-wire, three-wire with starter and three-phase packages combine a TriSeal pump with a Franklin 4" motor.
Actual flow depends on pumping lift, required outlet pressure and pipe resistance. Use the 50Hz performance curve to assess expected flow for the installation. The recommended pump operating range is approximately 13-60L/min, with best efficiency at approximately 30-55L/min.
The outlet is 32mm (1 1/4") BSPP female thread. A removable spring-loaded non-return valve reduces return flow when the pump stops. The pump is intended for bore water with minimal sand or sediment; the TriSeal design helps resist sand wear.
230V single phase, two wire. The BIAC starting switch is built into the motor. Motor overload protection stops the motor if it overheats or overloads. Two supply conductors plus protective earth.
230V single phase, three wire. Matching capacitor starter/control box included. The motor has built-in overload protection. Three motor conductors plus protective earth.
400V three phase. Requires a motor starter and motor-overload protection matched to the supplied motor nameplate. This protection cuts power if the motor overloads.
For automatic operation, connect suitable tank-level or pressure controls. Where the bore water level could fall below the pump, use dry-running protection to stop it before it draws in air. Extend the motor lead with correctly sized submersible cable and a waterproof cable joint for the installation depth.
Install vertically with the motor below the pump and allow clearance around the 99.1mm maximum diameter. Maximum motor submergence is 150m below the water surface. Keep the assembly at least 1.5m above the bore bottom and position it so water passes the motor before entering the pump. Support it with suitable pipework and a safety cable; never lift or suspend it by the electrical cable.
Standard motor application allows water up to 30°C. Higher temperatures require manufacturer assessment of motor loading and cooling. Water must flow around the outside of the motor to remove heat. Fit a flow sleeve where the installation cannot provide the cooling flow required by the motor nameplate, including tank and open-water installations. Keep the complete pump and motor submerged; do not run dry. FPS-3A-31TS, FPS-3A-46TS and FPS-3A-62TS need water to pass the motor at least 0.0762m/s (7.62cm/s) for cooling.
TriSeal independently floating impellers and seals at each impeller hub and eye reduce internal recirculation and resist wear from sand. The discharge and outer casing are AISI 304 stainless steel; the impellers are thermoplastic acetal and the diffusers are modified PPO. A ceramic sleeve and rubber bearing protect the shaft in abrasive water.
Three-year manufacturer warranty when the TriSeal pump is coupled to a new Franklin 4-inch motor, subject to Franklin Australia warranty terms, installation-period conditions and applicable consumer rights.
FPS 3A Official 50Hz Performance Curve
Franklin Bore Pump Installation & Operation
Franklin 4-inch Motor Installation & Operation
Franklin Motor Technical Guide (Australia & NZ)
