sand pump for 5000 gallon pool

Warman SRH Pump Info

Warman SRH Pump Info

The document summarizes the SRH/SRC series of centrifugal pumps designed for abrasive and corrosive slurries. Key points: 1) The pumps feature elastomer linings and advanced hydraulics to reduce the operating costs of pumping abrasive/corrosive slurries. This is made possible by incorporating the best features established from field proven designs ensuring ease of maintenance on site. By combining traditional strengths, ruggedness and dependability with advanced hydraulics, these pumps offer enhanced efficiency resulting in increased wearlife of components such as wearing liners and impellers. The advanced hydraulics utilises a unique patented volute design which reduces destructive turbulence thus further reducing the overall power consumption – the largest expense in total operating cost.

SRH “Wet Gland” or SRC ”Dry Gland”Configurations

SRH models deliver maximum hydraulic efficiency in applications where minor process dilution is permissible from wet glands. SRC models incorporate a unique two-stage dynamic expeller seal which eliminates seal water and reticulation while effectively sealing against suction heads of up to 12 metres. This sealing arrangement is completely protected by abrasion- and/or corrosion-resistant elastomer linings.

Advanced hydraulics

Reduced turbulence – unique volute design. Less recirculation and internal head loss. Superior suction characteristics – lower NPSH required.

Thicker Liners

Absorb impact from large particles. Reinforced non-collapsible liners Effective and reliable ”dry gland” capability Unique two-stage expeller design.

Uni que bearing arr angem ent

Utilises both radial and axial bearings.

Casing pressure ratings to 3500 kPa

Higher pressure ratings available. Fewer casing bolts and fasteners Full accessible eliminating hidden bolts.

Ex tend ed parts li fe

Less concentrated wear on liners and impellers. Lower impeller peripheral speeds. Less likely to cavitate.

Longer wear life

Greater resistance to cuts and crushing damage. Reduced erratic failu res No gland seal water required - ”dry gland” No dilution or contamination of critical processes. Eliminates the need for costly seal water and reticulation.

Maximum head capabil ity

M ore e ffici ent, adva nced hydraulics. High pressure app li cations Easily maintained Reduced maintenance downtime.

Feature

High efficiency design

Benefit

Reduced power consumption

Design features – reduced operating costs

SRC Configuration “Dry gland” expeller seal

Principle of operation

Typically with most centrifugal slurry pumps, the pressure at the gland increases as the sump level is increased or as the impeller rotational speed is increased to deliver additional hydraulic performance. To prevent leakage (and to prevent impregnating the gland packing with solids), gland service water is injected at a higher pressure to flush the slurry away from the packing. SRC configured pumps incorporate a unique two-stage auxiliary expeller design. The two expellers operate in series in independent expeller chambers to increase the expeller head capability and pump the process liquid away from the gland while subject to higher suction pressure (i.e. sump levels). The higher pressure developed by the centrifugal force generated by the two stages of expellers is balanced against the combination of the suction pressure and the pressure generated by the impeller to form an interface of air and liquid at the equilibrium point. The liquid, being denser, experiencing a larger response to centrifugal forces, creates a wall which the air is capable of penetrating. Consequently the air mixes with the liquid. Air under atmospheric pressure is permitted to enter through the gland packing and fill the void between the packing and expeller liquid interface. At a given impeller rotational speed the void will vary as the sump level varies as illustrated in the three examples. During operation of the pump the only pressure existing at the gland is atmospheric… even at increased impeller rotational speeds. The suction head capability of the SRC has been plotted on a separate performance curve. By plotting the discharge rate and total head for the pump the suction head, expressed in maximum permissible height of the liquid above the centre line of the pump expeller, can be established thus eliminating uncertainty associated with the application of the dry gland dual expeller configuration.

Advanced hydraulics

High efficiency Reduced turbulence/recirculation Superior suction characteristics

Unique two stage expeller

Eliminates costly seal water Suction heads to 12 metres Easily replaceable abrasion/corrosion resistant elastomer parts

Extended gland life

Minimum shaft deflection Seal assembly piloted directly to pedestal Unique bearing arrangement

Excellent Engineering Solutions

SRH Wet gland SRC Dry gland Unique volute design channels flow pattern Volute geometry leaving the impeller and directs it to the discharge with minimum turbulence