The range of the company includes 3 types of pumping stations:
- XA series (with cast iron body)
- series XI (stainless steel body)
- XK series (plastic housing)
Drainage pumps
The assortment of the Belamos company includes two series of drainage pumps.- The Omega series are lightweight, inexpensive pumps for pumping drainage and rainwater from pools, tanks, ditches, etc.
- The DWP series are professional pumps for pumping highly contaminated drainage and sewage water. CS models have a coarse crushing knife
Selection of DWP Series Drainage Pumps
Construction and garden wheelbarrows
The company sells construction and garden wheelbarrows in bulk. The advantages of our wheelbarrows are that they are lightweight, reliable, quick to assemble and competitively priced.- Construction wheelbarrows - one and two-wheeled, designed for the transportation of heavy construction materials: crushed stone, mortar, sand and stones.
- Garden wheelbarrows - thanks to their lightweight design and oversized wheel, ideal for transporting leaves, compost, soil
> PS1 and PS2 series refrigerant pressure switches
Application area.
The pressure switch is an integral part of any refrigeration plant. They are used to protect the system from excessively high or low pressure depending on the set point value. In addition to protective functions, pressure switches can be used to regulate the condensing pressure and shutdown the compressor “by pump down”. The pressure switch ensures long-term and safe operation of not only the compressor, but the entire installation as a whole.
Technical features
- adjustable pressure range;
- versions with manual and automatic return;
- various types of connections;
- indelible setting scale;
- minimum operating ambient temperature -50 ° С;
- maximum operating ambient temperature + 70 ° С;
- protection class IP44;
Explanation of designations
PS1- (1) (2) (3) PS2- (1) (2) (3)
| 1. Function | 2. Pressure range | 3. Connections | |||
|---|---|---|---|---|---|
| A= pressure switch, automatic; V= trip relay with external manual reset; WITH(for PS2) = left side of double relay - automatic pressure limiter; right side of double relay - disconnection with external manual reset; G(for PS2) = left side of double relay - trip relay with external manual reset; the right side of the double relay is a pressure cut-out fuse with an internal manual reset; L(for PS2) = left side of double relay-automatic pressure switch; the right side of the double relay is a pressure switch with an internal manual reset; R= pressure switch with external manual reset; S= pressure cut-out fuse with internal manual reset; W= pressure limiter, automatic; |
S= ¼ SAE int. thread with nipple and damper K= 1 m. Cap. tube with nut ¼ SAE L= ¼ ODM with cap tube 1m. U= soldering 6mm ODF X= soldering ¼ “ODF A= ¼ SAE out. thread G= G¼ int. R= G¼ out. |
||||
| Range (bar) |
Max. allowable pressure (bar) |
Test pressure (bar) |
|||
| 1,9. | -0,75… 3 | 11 | 13 | ||
| 2. | -0,8… 1,5 | 11 | 13 | ||
| 3,7. | -0,5… 7 | 22 | 24 | ||
| 4. | 1…20 | 20 | 23 | ||
| 6. | 4…12 | 14 | 16 | ||
| 5,7,8,9. | 6…31 | 31 | 35 | ||
Alco-Controls Standard Pressure Switch Table
| Model* | Regulation range | |||
|---|---|---|---|---|
| Working pressure bar) | Differential (bar) | |||
| left | right | left | right | |
| PS2-G8A (Dual) | 6…31 | 6...31 | manual return on high. | const. 4 |
| PS2-A7A (Twin) | -0.5...7 | 6...31 | 0.5...5 | const. 4 |
| PS2-L7A (Twin) | -0.5...7 | 6...31 | 0.5...5 | manual return on high. |
| PS2-R7A (Dual) | -0.5...7 | 6...31 | manual low return | manual return on high. |
| PS1-A3A (Single Unit) | -0.5...7 | 0.5...5 | ||
| PS1-R3A (Single Unit) | -0.5...7 | low pressure manual reset | ||
| PS1-A5A (Single unit) | 6...31 | 2...15 | ||
| PS1-R5A (Single Unit) | 6...31 | manual high pressure reset | ||
* In addition to the standard pressure switches shown in the table, Alco-Controls manufactures a number of models for OEM manufacturers (when ordering from 100 pieces).
| vendor code | Connection | Voltage | Frequency | Current | Power | On-off pressure | Max pressure | Working dark (deg.) | |
|---|---|---|---|---|---|---|---|---|---|
| (W) | (HP) | ||||||||
| PS-02B | 1/4 nut | 220V | 50Hz | 16 (12) A | 2200 (1500) W | 2Hp | 1.4-2.8bar | 6bar | 1-55 |
Pressure switch PS-02B
Water supply systems can be monitored and controlled by various parameters - water level, pressure, temperature. The most common is pressure control. One of the simplest and most popular elements of home automation in this case is the pressure switch.
This relay is designed to control electric pumps for supplying water to the house. With the help of the relay, the pump will work clearly in the set pressure mode. At the minimum pressure, the contacts close and the pump turns on, and when the maximum pressure is reached, the contacts open and the pump turns off.
This is a two-contact relay for switching electrical circuits, which is triggered by the pressure of the water in the system. Inside its body there are electrical contacts that are controlled by a membrane.
The pressure switch is most often connected to the pumping station using a special five-way adapter. In addition to the pressure switch, a pipe from a pump, a pipe from a water supply source, a hydraulic accumulator and a pressure gauge are connected to the adapter.
The pump pumps water into the accumulator. According to the readings of the pressure gauge, one can observe how the water pressure increases. The pressure switch automatically controls the activation and deactivation of the pump.
When the relay is connected to the adapter (connection size - 1/4 "), water presses on the membrane, which presses on the springs that control the electrical contacts. The relay contacts are connected in series with the pump motor and supply voltage to it.
The principle of operation of the pressure switch is very simple. If the pressure in the system has dropped below the switch-on level (1.4 bar or a preset value), then the contacts will close and the relay will switch on the pump, and if the pressure in the system is higher than the switch-off level (2.8 bar or also a preset value) , the membrane presses on the springs, the contacts open and the pump will automatically turn off. When the pressure drops below the set value, the process is repeated.
Thus, the pressure switch is used in order to automatically maintain the water pressure in the water supply system in the operating range of 1.4 - 2.8 bar (factory pressure settings) or 1 - 5 bar (manual settings).
These relays are configured at the factory according to existing standards and regulations. The settings, as a rule, do not need to be changed, because they are the most optimal. Sometimes it becomes necessary to configure the relay to its own, different from the factory parameters of operation. You can achieve the desired result in the adjustment by rotating the two clamping nuts in different directions.
To do this, you need to remove the cover from the relay. There are two nuts in the body - a large and a small one. The large nut can be used to set the cut-off pressure of the pump. To increase the response threshold, turn it clockwise and check the pressure. With the help of the second nut, you can change the difference between the pressure on and off the pump, both up and down.
All of these adjustments must be made using a pressure gauge. After adjusting the relay, be sure to close the cover.
