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COOLING TOWERS, OPEN

In cooling towers, the cold water heated in industrial or power plant processes is cooled.

Housing and steel internal installations:
The housing of LISTER cooling towers with the water collection basin forms a fully assembled unit. It consists of a 2 mm thick sheet steel construction. The folded metal sheets, sealed with a permanently plastic material are bonded together by stainless steel screws. There is a sufficiently large sized inspection opening at the back of the cooling tower. Between the fan and cooling tower housing an exhaust vent is arranged to allow sufficient distance between the wet chamber and ventilation rotor
Material: Stainless steel, material no. 1.4301. The cooling towers thus offer an optimum cooling for the requirements of industry.

Filling material:
The filling body consists of plastic elements. These are characterised by a high exchange capacity, mechanical strength and relatively low pressure loss

Droplet separator:
The droplet separator is made of plastic, with a high degree of separation.

Water distribution
The water is distributed through a system of pipes with PP hollow cone nozzles, which are largely insensitive to clogging. A uniform water distribution is ensured even at low inlet pressure. The individual nozzle tubes are easy to develop for maintenance by a plug connection.
Material: Stainless steel, material No. 1.4301 alternatively.: Hot-dip galvanized steel.

Water connections:
Water supply and drain may be provided with flanges PN 16, DIN 2633, overflow and drain connectors have pipe thread connections.
Material: Stainless steel, material No. 1.4301 alternatively.: Hot-dip galvanized steel.

Suction filter:
In the cooling tower in front of the discharge nozzle there is a screen box with a mesh size of about 5 mm, which prevents cavitation and is easily removable for cleaning.
Material: Stainless steel, material no. 1.4301.

Fans:
As fans, double inlet, low pressure-high performance fans are used, which are characterised by high efficiency and low noise. The housing is made of galvanized steel sheet with additional corrosion protection with two-component painting. The drum rotors are balanced statically and dynamically. The fan shaft is designed in deep groove ball bearings, which are protected by labyrinth seals against dust and moisture. Relubrication via free lubrication lines, or in small series permanently lubricated bearings.

Drive:
The drive of centrifugal fans takes place via narrow V-belt by a standard three-phase AC motor of type B 3 with two-stage rotation speed in Dahlander connection and protection type IP 55. The belt tension can be easily adjusted by means of slide rails. The pulleys are made of wear-resistant cast steel and are secured by releasable clamping bushes. For reasons of operational security every fan is associated with a separate drive motor in multicellular units.

 

Cooling tower, open, double-cell

DOSING STATION - HARDNESS STABILISATION

Diaphragm dosing pump with a maintenance-free short solenoid

Output at 16 bar:	1.1 l/h
max. backpressure:	16 bar
Average power consumption:	17 Watt, 0.85 A, 230 V
Protection class:	IP 65
Class of insulation:	F
Connecting pressure hose:	6 x 4 mm

External cable for controlling the metering pump by contact water meter

Chemical dosing container 60 l

• made of transparent, UV-stabilised polyethylene, with liter scale and lockable screw cap.
• Threaded inserts for mounting the metering pump are sintered
• particularly stable design with R ¾ "-plug for emptying
• Suction set from PP completely with foot valve and level switch
• 5 m suction line from PP soft 4.6 mm - Height: 600 mm, diameter: 410 mm, weight: (4 kg)

Metering lance
adjustable, spring-loaded injection valve for variable insertion depth of 20-165 mm

Material:	PVC, spring from Hastello, ceramic balls
Dichtungen:	FPM (Viton) und Silikon
Anschluß:	6 mm - R ½" for PE pipe 6/4 mm
Max. operating pressure:	6 bar

Contact water meter (DIN - version)
PN 16, readable, including MS screw connections and polystyrene seal.

Operating temperature max.:	40°C
Continuous load / nominal load:	5 / 2.5 m³/h
Pulse spacing:	1l
Connection size:	¾"
Connection thread:	G1
Contact load:	max. 100 mA, 24V
Length without locking screw:	190 mm

 

 

Standard inoculation for cooling tower systems with a capacity of up to 1,200 kW

Blowdown systems

Conductivity meter LMW 50
Conductivity meter in wall cabinet with glazed door, illuminated display, alphanumeric display of temp. and conductance and temperature compensated.

Measuring range:	0 - 2.500 µS/cm
Hysteresis:	2% of set value (fixed)
Electrical contacts:	Changer potentially loaded, freely adjustable
Time delay:	adjustable from 0 to 5 min.
Recorder output:	0 - 20 mA
Manual switch:	Switch contact switches immediately for inspection a ball valve or solenoid valve, Conductivity measurement in the meantime not active.
electr. Connection:	230 V, 50-60 Hz, 7 VA, protection class: IP 54

Measuring cell
Temperature compensated measuring cell with integrated temperature sensor

Screw thread:	¾", O-ring sealed
Measuring cell constant:	Unscrewing C = 0.1 with 5-pole diode plug
Measuring contacts:	V4A DIN 4571
other materials:	Seal PVDF / housing PA6

Ball valve

Number:	3 pieces
Connection thread:	DN 15
Material:	PVC

Flow-through housing for LF-measuring cell

Connection thread:	DN 15
Material:	PVC

Motorised ball valve
Two-piece body design (screwed) with full cylindrical passage, directly controlled by electric motor with downstream transmission for liquid, neutral and aggressive media.

Materials:	Plastic housing / ball valve MS chromed / seal PTFE and FKM (Viton)
Connection:	R ½"
Protection class:	IP 65
Operating pressure:	40 bar
Medium temperature:	max. +120°C
Runtime:	90 sec.
Power consumption:	2.5 VA
Lead-in voltage:	230 V / 50 Hz

Overall dimension of the plate

W x H x D: 300 x 500 x 150 mm

Standard blowfeed system with a capacity of up to 1,200 kW preassembled on board and ready to plug in