This Taco Series 1900, Model 1935-4P-PD pump is a close-coupled in-line pump with a 2" (50) mm suction and 2" (50) mm discharge. It features a 6.15" nominal impeller diameter and is constructed with a CI casing, SS impeller, and CI bracket with bronze face plate. The bracket design is the first design (current) with companion flanges. The seal consists of a ceramic seat, carbon rotor, and EPT rubber, which can withstand temperatures up to 250 Deg F. The frame size is 380-480/3 with VFD 1-1/2 & 2 HP, and the motor has a premium efficiency of 1-1/2 HP at 1750 RPM. The motor part number is provided as 1662-129. DOE Info indicates PEI = 0.51, RPM = 1750, and Manufacturer Model Number = 1935-4P-PD.
1900 Series Overview
1900 Series of close-coupled in-line pumps are manufactured by Taco Comfort Solutions, a global authority in designing and building heating and cooling systems since 1920. These pumps adhere to modern hydraulic performance and reliability benchmarks. The series incorporates five distinct models, with sizes spanning from 1-1/2" x 1-1/2" to 2" x 2". They offer a flow range from 10 to 250 GPM and can reach up to 160 feet of head capabilities.
These pumps are known for their compact, energy-efficient design, which allows for flexible installation in any part of the piping layout. They are self-supporting, eliminating the need for extra external support or strapping. They can be installed both horizontally or vertically.
1900 Series pumps are essentially maintenance-free, thanks to the motor's permanently sealed, grease-lubricated ball bearings. All models of the 1900 Series come equipped with standard ceramic seals, compatible with a wide range of application requirements.
Features & Benefits
- Energy efficient compact design provides flexibility in installation
- Self-supporting design permits both horizontal and vertical installation
- Pump and sealed ball bearing motor are maintenance-free
- Rear pullout design, together with a standard motor, facilitates simple and straightforward servicing
- One seal and shaft sleeve fits all models, providing superior parts interchangeability
- Sturdy casing design allows a maximum operating pressure of 175 psi and a maximum operating temperature of 300°F
- Available in either cast iron stainless-steel fitted or all stainless steel construction, with NSF 61 Certification
- Pressure tappings allow for differential pressure readings to be taken across the pump
- Dynamically balanced, one-piece cast 304 stainless steel impeller ensures long life and high pump efficiency
- Standard Type 21 mechanical seal design ensures quick and easy replacement, available in ceramic or new "Sealide C" for aggressive system fluids, guaranteeing a broad range of application suitability. One size seal fits all models.
- NEMA standard 56 frame C face motor
- Parts flexibility is high: one seal and one shaft extension fit all models
- Every pump in the 1900 Series is factory tested and built in accordance with Hydraulic Institute standards
