Installation Components - Grundfos DMM 4 Instrucciones De Instalación Y Funcionamiento

4.5 Installation components

The position numbers refer to the numbers in the
drawing in section 4.4 Installation example. All com-
ponents are GRUNDFOS accessories.
Pos. Designation
1 Tank Polyethylene chemical tank made ready for the installation of pump, suction line, and
hand mixer. The tank is available in several sizes between 60 and 1000 litres.
2 Suction line Suction line for installation in tank. Three different types are available:
1. Simple foot valve.
2. Flexible suction line with foot valve and hose.
3. Rigid suction line with foot valve.
3 Hand mixer Manual mixer (stamper) for tank.
4 Head vent Manual vent for direct mounting on the pump discharge connection. The outlet
hose of the vent should be connected to the tank.
GAS-EX Automatic degassing device for direct mounting on the pump discharge connection.
The degassing device can be set to open at intervals from every 30 seconds to every
45 minutes. The opening duration can be set between 0.5 and 10 seconds. The outlet
hose of the degassing device should be connected to the tank.
5 Multifunction Valve block for direct mounting on the pump discharge connection.
valve
Functions:
1. Counter-pressure valve to optimize the dosing accuracy. At the same time, the
2. Antisiphon function to prevent undesired siphoning from the system.
3. Relief valve to protect the pump against excessive pressure.
4. By-pass valve for pressureless return of the liquid to the tank.
6 Flow indicator Flow indicator for direct mounting on the pump discharge connection. Used for dos-
ing monitoring by means of a jumping ball in a transparent pipe.
7 Pulsation damp- Pulsation dampener for reducing pressure surges at dosing strokes, thereby en-
ener PDS suring a steady dosing flow. The dampener is particularly suitable for long dis-
charge lines and/or lines with a small diameter.
8 Counter-pres- Adjustable counter-pressure/relief valve with the following functions:
sure/relief valve
1. Counter-pressure/relief function if a constant counter-pressure is required to
2. Relief valve protecting the pump against excessive pressure. The outlet hose
The valve shown in the installation example in section 4.4 is installed as a counter-
pressure valve.
9 Injection valve Injection valve consisting of an injection pipe, a non-return valve, and a connection.
10 Priming aid Priming aid for direct mounting on the pump suction connection. Particularly suita-
ble for high suction lifts and/or long suction lines. Designed for the following pur-
poses:
1. To facilitate priming when starting the pump.
2. To collect undesired air in the suction line during operation.
valve prevents excessive dosing in pressureless systems.
obtain a steady flow, irrespective of pressure variations in the system.
should be connected to the tank.
Description
11