Suction Lance Assembly for 500 / 1000 Litre Tank

AC.LA.5 & AC.LA.5A Chemical suction lance assemblies for use with either a 500 Litre or 1000 Litre tank or vessel measuring up to 1450mm long as standard.

AC.LA.5/10 Suction Lance Introduction

The AC.LA.5/10 and AC.LA.5/10A are suction lance assemblies which are designed to be mounted into either a 500 Litre Dosing Tank or a 1000 Litre Chemical Dosing Tank, allowing a chemical dosing pump to draw the liquid for operation and remain primed. The suction lance assemblies help a dosing pump to remain primed using the integral non-return valve and provide a low level signal from the integrated low level float.

We offer two different types of suction lance assembly for 500 Litre or 1000 Litre chemical tanks.

• The AC.LA.5/10 which uses 4x6mm dosing tube - for use with our HY, AT1, AT2 and AT3 range of dosing pumps which support a low level / alarm input.
• The AC.LA.5/10A which uses 8x12mm PVC dosing tube - for use with the AT4 range of dosing pumps which support a low level / alarm input.

Both the AC.LA.5/10 and the AC.LA.5/10A provide a volt free contact closure when the chemical level is 50mm above the lowest suction point.  This can be connected directly to the dosing pumps that support either a low level or alarm input, such as the HY-Series, AT-BL, AT-AM, or AT-MT series, or alternatively into a PLC, BMS or other device which supports a volt free contact closure.

The chemical is delivered to the pumps suction side through a fluoropolymer elastomer non-return valve.  This is mounted inside the 500 / 1000 Litre suction lance inlet and prevents the chemical from returning back down the suction lance assembly.  Inside the riser tube runs a length of suction tubing which is manufactured in either soft PVC or PTFE.  The AC.LA.5/10 is available with 4x6mm PVC or PTFE, and the AC.LA.5/10A is available with 8x12mm PVC.

500 / 1000 Litre Suction Lance Wetted Parts

The AC.LA.5/10 is designed to be permanently mounted into a chemical container such as a 500 Litre Dosing Tank, 1000 Litre Dosing Tank, or a container with a maximum height of approximately 1450mm.

Each suction lance is available with a selection of wetted parts, highlighted in the below table, which are designed to ensure compatibility with a very wide range of chemical processes.

*PTFE Is only available with the AC.LA.5/10 not the AC.LA.5/10A.

We strongly recommend you check the wetted parts of the injection valve against our chemical compatibility database or speak with your chemical supplier, to ensure that all the parts are compatible with the chemical to be dosed.

500 / 1000 Litre Suction Lance Dimensions

As standard both the AC.LA.5/10 for 4x6mm tubing and the AC.LA.5/10A for 8x12mm suction tubing are manufactured to a length of 1450mm.

They include a 70mm diameter conical flange which is designed to allow the height of the suction lance assembly to be adjusted so that it matches the depth of the chemical dosing tank.

The suction lance can be supplied in custom lengths if the required length is different from those in our range.

The widest inserted section of the suction lance assembly measures 31mm Ø allowing the suction lance to remain rigid while also offering a compact size for easy insertion into a chemical vessel.

For the AC.LA.5/10 with 4x6mm tubing, the riser tube of the suction lance assembly measures 21mm Ø with space for both the low level signal cable and suction tubing.

The AC.LA.5/10A with 8x12mm or 8x10mm is housed in a wider riser tube measuring 31mm Ø with space for both the low level signal cable and the suction tubing.

Electrical Installation

Installing the suction lance assembly is very straight forward.  Prior to immersing the suction lance into the chemical, we strongly recommend that the electrical connections are connected to either the dosing pump or piece of control equipment that will be receiving the volt free signal.

As standard, the float switch is designed to provide a normally closed (NC) signal on a low level.

The user can change the direction of the float switch by simply unscrewing the lower mounting and changing the direction of the float switch so that a normally closed contact is given on a high level.

The PVC cable should then be connected to the control equipment.

The suction lance assembly has the following electrical ratings:-

• maximum current of 1amp
• maximum power 50W
• maximum voltage of 200 VDC or 300 VAC

Mechanical Installation

The suction tubing is normally connected to a dosing pump by pushing it through a lock nut and compression ring before sliding it over a conical connector in the same way that a standard foot valve and strainer assembly is connected.  It's important to ensure that the suction tubing is free from kinks.

Installing the suction lance into a 500 Litre tank, 1000 Litre tank, or chemical tank of equivalent height is straight forward.  We recommend drilling a 32mm Ø hole in the top of the tank, to allow the suction lance assembly to slide inside.

Creating a permeant access point for the suction lance assembly is preferable to permanently unscrewing the lid of a dosing tank or leaving the man-way access point of the tank open.

Using the flange, the height of the suction lance assembly can be adjusted to match the depth of the tank, allowing the bottom of the suction lance to rest on the bottom of the tank, leaving the inlet free to operate without restriction.

One major advantage of using a suction lance assembly is that they allow a chemical container to be quickly and easily changed with minimal interference into a process.  For applications where this isn't required, the flange has 4 mounting holes which can be used to bolt or screw the flange into place.

We recommend using the suction lance assembly in non-viscous solutions where the fluid in contact with the suction lance is free from solids. Any build up of solids can become trapped between the PVDF float and the assembly, preventing the float switch from functioning correctly.

Suction lances are suitable for an operating temperature of -20°C to + 55°C when manufactured in PVC with higher ranges for suction lances manufactured in cPVC.

When operating normally, the non-return valve inside the suction lance assembly will allow the chemical to be drawn into the suction tubing but not to return back down the suction tubing.

AC.LA.5/10 & AC.LA.5/10A Features & Benefits

Each suction lance assembly is a simple reliable way of ensuring that a dosing pump remains primed due to the integral non-return valve.

Manufactured with a choice of chemically resistant materials to ensure compatibility with a wide range of chemical reagents, there are also options on the suction tubing to suit 4x6mm dosing pumps in the AC.LA.5/10 and either 8x10mm or 8x12mm tubing in the AC.LA.5/10A, for use with higher output dosing pumps such as the AT4 series.

The float is manufactured in chemically resistant PVDF and will give a low level signal when the chemical is 50mm above the lowest suction pump.  With a simple volt free contact operation, each suction lance assembly is compatible with a wide range of equipment including direct connection to dosing pumps, PLC's, BMS's or can be integrated into control panels and other electrical circuits.

The conical flange allows the suction lance assembly to be mounted into a chemical container with a maximum height of 1450mm, and the riser tube can be adjusted to ensure it provides good suction.  The mounting holes allow the suction lance assembly to be secured into place.

In addition to the mounting holes, each suction lance assembly can be manufactured to a desired length, if required for a specific application.