Impeller Sample Clauses
Impeller. Impeller shall be of cast iron and shall be of the single or double shrouded non-clogging design. Impeller shall be statically, dynamically, and hydraulically balanced. Impeller shall be securely keyed to the shaft with a locking arrangement whereby the impeller cannot be loosened by torque from either forward or reverse direction.
Impeller enclosed, single suction, 2-vane or 3-vane, and keyed to the shaft. May 2017 C01025C17 VARIABLE SPEED NON-CLOG Georgetown Wet Weather Treatment Station 11340 - 6 CENTRIFUGAL PUMPS
Impeller. 1. Impeller shall be Duplex stainless steel of the axial flow two or four-vane design, capable of passing solids as scheduled in Design Requirements. The impeller and bowl diffusion vanes shall be of a hydrofoil designVane leading edges shall be rounded to prevent accumulation of fibrous material. Impeller shall be statically and dynamically balanced to limit vibration and be supported on sides by bearings for stability.
2. Impeller shall be attached to the pump shaft by use of longitudinal keyways and annular keyways fitted with snap rings to prevent axial movement.
Impeller a. The impeller shall be of ASTM A-532 (Allow III A) 25% chrome cast iron or ASTM A536 ductile iron, dynamically balanced, semi-open, multi vane, backswept, non – clog design.
b. The impeller vane leading edges shall be mechanically self- cleaned upon each rotation as they pass across a machined spiral groove located on the stationary insert ring maintaining an unobstructed leading edge.
c. The impeller shall have induction hardened, screw shaped leading edges and shall be capable of handling solids, fibrous materials, heavy sludge, and other matter found in wastewater.
d. The Impellers shall be locked to the shaft and coated with Skotche 134 or equal fusion bonded epoxy.
e. The Impellers shall be trimmed to specifically meet the conditions of operation.