Pasta GLM metering pump- Parameters
Flow rate: 0-3200L/h
Pressure: 0-12 bar
Number of strokes: 70-187
Motor power: 0.25-1.5kw
Pump head material: 316L, PP, PVDF
Temperature resistance: 0-45 ℃
Accuracy: ± 2 of the set point

Pasta GLM metering pump- Material
Pump head: PP, PVDF, 316L stainless steel
Membrane: PTFE multi-layer composite membrane
Valve ball: ceramic or stainless steel
Pump casing: aluminum alloy
Base: Stainless steel or coated steel
Pump head connector: PP or cast iron (with ETFE coating)
Lubrication: Oil bath
Coating: Epoxy paint

Pasta GLM metering pump- Application
● Municipal water treatment
Cooling tower water treatment
● Demineralization regenerator
● Various types of sewage treatment
Petrochemical/chemical/refining process applications
Power plant boiler water treatment
● Other industrial sectors

Pasta GLM metering pump- Characteristics
The GLM metering pump has a compact structure, small volume, and a wide range of flow options.
The gearbox adopts bath lubrication inside, which reduces maintenance workload.
Transparent oil window design for easy inspection.
High strength composite membranes have good durability.
Large sized plunger ensures stable operation.
The stroke automatic locking function prevents drift during use and ensures stable flow output.
Large size knob, easy to grip and operate.

Pasta GLM metering pump- Installation points
The pipeline needs to be correct, and dampers, filters, safety valves, and oil replenishment valves need to be installed on the pipeline to achieve stable flow and pressure, thereby achieving precise dosing.

Venue
When selecting installation locations and designing chemical feeding systems, consideration should be given to providing access for daily maintenance. GLM ® The DM7 pump can be used for indoor and outdoor operation, but a hood or cover should be used for outdoor operation. If the ambient temperature is below 0 ° C (32 ° F), external heating should be applied (especially when the pump is in intermittent operation). If you need to know the suitable environment for pump operation, please consult the factory. The pump should be firmly fixed on a sturdy and flat foundation to minimize vibration, otherwise it may cause loose connections. After fixing the pump with bolts, be careful not to shake the base to avoid affecting alignment. The horizontal deviation of the pump should be within 5 ° to ensure the normal operation of the check valve.

Pipeline system
1. A separate system safety valve used to protect pipelines and process equipment (including pumps) from exceeding operating pressure. An external safety valve is required! It is not recommended to install any valve like flow blocking components between the pump outlet and the safety valve.
2. It is recommended to install shut-off valves and pipe joints (or flanges) on the import and export pipelines. This device can inspect check valves without emptying long pipelines, making maintenance and inspection of check valves more convenient. The size of the shut-off valve should be the same as the size of the connecting pipeline. Ball valves can be used first because they have minimal flow restrictions.
3. Imported filter screen (if applicable to pumped products). The pump check valve is prone to dust and other solid pollutants, and any accumulation of pollutants may cause operational failures. The filter should be located between the inlet line shut-off valve and the pump inlet valve. Its size should be determined based on the flow rate and expected pollution level. It is usually recommended to use a 100 mesh filter.
4. Vacuum/pressure gauges on the inlet and outlet pipelines are used to check the operation of the system. The pressure gauge should be installed in conjunction with the shut-off valve for isolation and protection when not in use.
5. The weight of the pipeline cannot be supported by valve sleeves or other pump head components, as their stress may cause leakage. If appropriate, thermal expansion joints can be provided so that no external force or torque is applied to the pump.
During the pipeline connection process, a sealing agent compatible with the chemical properties of the pumping material should be used. Users who use sealing tape should be extra careful not to seal the threaded head of the inlet pipe, and ensure that the sealing tape has been completely removed from the old thread before reuse. All new or existing pipelines should be flushed and cleaned with clean liquid (compatible with the material) and air dried before connecting to the pump. Cleaning the debris in the pipeline system before starting is a necessary preparation to ensure the normal operation of the check valve.

Inlet pressure requirements
Although GLM metering pumps have a certain degree of self-priming ability, it is still advisable to use infusion suction (i.e. suction pressure higher than atmospheric pressure) as much as possible. The pump should be placed as close as possible to the suction side storage tank or supply source. For liquids with a vapor pressure of 5 psi or less (operating temperature), the liquid suction height is approximately 10 feet (3.05 meters). If this requirement is not met, the pump cannot provide reliable and accurate flow. It is recommended to use a bottom valve at the low point of the inlet pipe during self-priming installation. To ensure the normal operation of the pump during self-priming installation, it may be necessary to fill the pump first. When the suction pipeline is relatively long or the number of strokes of the pump is high, in order to have good inlet pressure conditions, please use an inlet pipe with the largest possible diameter. In some cases, the diameter of the suction port may be larger than the required inlet diameter of the pump. For detailed questions regarding the inlet pipe diameter, please contact us by phone.

Export pressure requirements
All GLM metering pumps are designed for continuous operation at rated outlet pressure. If the inlet pressure of the system is greater than the outlet pressure (this situation is sometimes referred to as "self flow"), the pump will generate additional flow (siphon). This situation can lead to a decrease in accuracy and loss of control in the measurement process. To avoid this overcurrent situation, the outlet pressure should be at least 0.35 Bar (5 psi) higher than the inlet pressure. If necessary, this pressure can be achieved by installing a back pressure valve on the outlet pipeline. In addition, it is necessary to avoid the actual outlet pressure exceeding the rated value of the pump, otherwise it may cause damage to the pump components.

Pasta GLM metering pump- Common models