R016600x

Steam Generator & Fluid Heater Installation Manual

2.9.1 Supply Side Connections Clayton’s reciprocating PD pumps require that the connection made directly to the pump’s inlet be a flexible hose section. This hose section should be a bellows-type hose protected by a stainless steel wire mesh sleeve. It must have at least a 24 inch (61 cm) length with a minimum 18 inch (45.5 cm) long-live length. This flexible hose section must be appropriately rated to meet the pressure and temperature require- ments of the feedwater supply system. The supply-side piping system must include a pipe anchor directly at the inlet (hot-well /DA) side of the flexible connector. 2.9.2 Discharge Side Connections A flexible hose section is required at the reciprocating PD pump discharge outlet whenever it is relo- cated from its original, factory-designed, installation location. This hose section should be a bellows-type hose protected by a stainless steel wire mesh sleeve. It must have at least a 24 inch (61 cm) length with a minimum 18 inch (45.5 cm) long-live length. Because Clayton’s mono-flow heating coil design usually increases feedwater discharge pressures from Clayton’s reciprocating PD pump, this flexible hose section must be appropriately rated to meet the pressure and temperature requirements of the reciprocating PD pump output. The flexible hose rating requirements for the discharge will differ from the rating requirements for the inlet flexible hose section. Contact Clayton Engineering for the feedwater pressure of the specific gener- ator model. 2.10 Pump Suction and Discharge Piping System Design The suction piping system is a vital area of the piping supply system. Therefore, its design require- ments deserves more careful planning. 2.10.1 General Layout Guidelines • Lay out piping so no high points occur where vapor pockets may form. Vapor pockets reduce the effective flow area of the pipe and consequently make pump priming and operation difficult. Vent any unavoidable high points and provide gauge and drain connections adjacent pump. • Install eccentric-type pipe reducers when required. Make sure these reducers are installed with the flat side up. • Keep piping short and direct. • Keep the number of turns to a minimum. • Keep friction losses to a minimum by incorporating smooth fluid flow transitions in the piping lay- out. This can be accomplished with long radius elbows, two 45° elbows, or 45° branch laterals instead of tees. • DO NOT use Clayton equipment for pipe support or pipe anchoring. It is the responsibility of the installation contractor and the customer to provide adequate and proper pipe supports and anchors. Clayton recommends all steam/ fluid heaters, PD feedwater pumps, and water treatment skid pipe supports and anchors use floor-mounted structural steel.

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08/11/2016