Manufacturing Support

Manufacturing Support Services

Knect's Manufacturing Support Services provides skilled and semi-skilled teams of people, plus their associated supervision and management, to run all or part of our client's production, service, or support operation on a short or long-term basis. We also provide expertise and experience to improve and develop your manufacturing operations.

Management Service

It is the quality of our management service that distinguishes Knect from other providers. The breadth and depth of management capability in our chosen markets and support activity means we deliver our promises and build long term relationships with customers because they are assured of service delivery, ongoing improvement and reduced risk. We are able to increase resource flexibility and develop process and productivity improvements so as to reduce overall operating costs.

The hydraulically actuated downward opening weir 


The hydraulically actuated downward opening weir is suitable for pipeline, box culvert, channel and diversion well. It can play the role of flushing, preventing back flow and controlling overflow water level.


The hydraulically actuated downward opening weir mainly consists of weir gate, hydraulic system (including accumulator and accessories), ultrasonic liquid level meter and control system. For the convenience of future maintenance, overhaul gate slots are reserved before and behind the weir gate.


Flushing: The ultrasonic level sensor detects the water level upstream to the weir gate. When the upstream water level is low, the weir gate moves up to close to retain the water. When the upstream water level reaches the set value and the downstream water level is detected to be low as well, the weir gate will open downward quickly, and the potential energy formed by the head difference on both sides of the weir gate fulfils one flushing. Times of flushing per day can be configured.

Preventing back flow: The height of the weir gate is controlled by the downstream water level information, so that the weir gate moves up and down following the downstream water levels. Moreover, the top of the weir gate is always set higher than the downstream water level to prevent the downstream water back flow.

Flow control: The height of the weir gate is controlled by the height difference of the water level before and behind, so that the flow rate through the weir gate reaches the preset value to achieve constant flow control.


1) Compact structure. The weir gate opens downward, which does not occupy the upper installation space. It does not affect the landscape at ground level.
2) It can be positioned at any height.
3) Both local and remote control.
4) The weir gate is mainly made of stainless steel with high strength and corrosion resistance.
5) Bidirectional sealing and zero leakage.
6) In case of power failure, the weir gate can move downward by gravity to ensure flood discharge.


Smart Jet Cleaner


The smart jet cleaner is a kind of intelligent flushing equipment specially designed for retention tanks. It uses the gas-liquid mixture to aerate, stir and flush the sewage containing sediments and debris in the retention tank.


1) Make use of high-speed jetting gas and water mixture to flush the bottom of the retention tank. Highly effective flushing result.

2) The maximum flushing radius can be up to 30 meters.

3) The flushing angle of the nozzle can be rotated and adjusted, spraying and rotating at the same time, with no dead spaces to be left.

4) During spraying, there is a certain degree of aeration to reduce the COD content in the retention tank.

5) Fully made of stainless steel, strong corrosion resistance and reliable performance.

6) Flushing continuously without external water sources. 

7) Flexible installation. It can be installed in a fixed place, and it can also be easily removed to be used to flush several places.

Working Principle

When there is a certain depth of water in the retention tank, the smart jet cleaner is controlled by the control system. It will spray the mixture of water and gas every other time. The water body in the retention tank can be aerated, and its COD content will be degraded to avoid producing peculiar smell.

When the submersible sewage pump at the bottom of the retention tank starts to discharge, the configured level meter detects that the water level in the retention tank reaches the setting water level, the Intelligent control system controls the smart jet cleaner nozzle to begin rotating in the 0~260° range (as shown above) and stirring the tank all around, so that the sediments at the bottom of the tank are in a suspended state. At the same time, the submersible sewage pump discharges the suspended wastewater to prevent the suspensions depositing once again at the bottom of the tank.

When the water in the retention tank is to be drained, the smart jet cleaner uses the water of the tank sump to flush the bottom of the retention tank, and the sewage after flushing is discharged by the submersible sewage pump.

The HD camera equipped with the retention tank can automatically capture the bottom image of the retention tank, and through the intelligent control system the captured images will be intelligently gridded. When a certain region is sensed unclean with dirt, the system will automatically send out a signal to control the smart jet cleaner to flush the region particularly.


Self-cleaning Horizontal Screen


Self-cleaning horizontal screen is an automatic solid object intercepting device. It can effectively intercept the floating and solid particles in rainwater and sewage, and has automatic cleaning function. It is widely used in urban drainage works. It can be installed in front of overflow weirs, retention tanks and other locations.


Self-cleaning horizontal screen consists of screen body, oil cylinder, accumulator, ultrasonic liquid level meter, control system, etc. If required, high definition camera can also be installed to carry out real-time monitoring to the screen operation.


In the upstream inlet of the screen, a liquid level sensor is generally configured, and when the water level reaches the setting height, the screen will start up automatically. The raking teeth move back and forth to remove the contaminants that stick to the screen. It plays the role of self-cleaning while not affecting the flow capacity through the screen. When the retention tank reaches the setting water level or when the water level drops to the setting value, the cleaning comb will move to the end and automatically stop running. At the same time, a pressure protection device is installed on the oil line to protect the oil cylinder from forcibly acting to cause any damage to the screen bars in case of blockages during the operation of the screen.


1) It can efficiently remove captured debris from a wide variety of water intakes without affecting the intake water flow.

2) It has the function of automatic cleaning to prevent the solid wastes sticking to the screen bars and affecting the flow rate;

3) Highly automatic and effective separation. It can guarantee continuous stable operation, with minimal maintenance.


Flap Type Flushing Gate System


The Knect Flushing Gate system is a sediment flushing device designed to remove settled debris from storm water retention tanks, combined sewer overflow retention tanks, equalisation tanks and reservoir floors, using a single flush.


Design requirement of retention tanks

Retention Tank Structure

In general, the retention tank is divided into several units according to its volume, and each unit is divided into three parts: a water storage chamber, a flushing corridor and a sewage corridor.

Flushing Corridor Structure

Width: In order to ensure the flushing effect, the width of a single flushing corridor cannot exceed 5m;

Length: The length of a single flushing corridor cannot exceed 100m;

Slope: The slope of the flushing corridor is generally no less than 1%, not higher than 5%.

Water Storage Chamber Structure

Width: The width of the water storage chamber is the same as that of a single flushing corridor;

Length: The length of the flushing Water Chamber is related to the length of the flushing corridor;

Height: Not less than 1.5m;

Slope: Generally, no less than 5%.

Working Principle

Retaining Process

Through the retaining gate it retains the water flow of the main channel. The field monitoring data (water quality, water level, etc.) can be transmitted and analyzed by Remote Control PLC system. 

Flushing Process

When the rainwater retention tank is empty, the tank bottom needs to be cleaned. Through the remote PLC controlled hydraulic system, the flushing gate opens instantaneously. It also operates when the retaining water level reaches the pre-set opening value through an automatic program or PLC automatic control system to automatically flush the downstream main canal.

After the opening of the flushing gate, the flushing water in the water storage chamber produces a powerful flushing wave (similar to a dam burst), which rinses the bottom of the retention tank.

Flushing Completion

When the flush is complete, the retaining gate returns to the opening position and waits for the next flush process.


1) Good flushing effect, high safety;

2) High flushing efficiency, effective flushing length can exceed 100m;

3) High performance materials, strong structure, durable, cost-effective;

4) Simple structure, no noise, save energy, protect the environment;

5) On-site real-time monitoring, PLC remote control.

6) No Fresh Water supply required

7) Requires little or no maintenance.

8) Easy to retrofit to existing installations.


Flushing the rainwater retention tank


Vacuum Flushing Device

Product Introduction

The vacuum flushing device is used to clean retention tanks.

The construct of a retention tank vacuum flushing system consists of a water storage chamber, a flushing corridor and a catchment corridor. The vacuum flushing system itself consists of a water storage chamber, a vacuum valve, a vacuum pump and an automatic control system. Vacuum flushing has extensive applications. It can be used either for a circular retention tank or a square storage tank.


Working Principle

Inflows enter the water storage chamber: When there is a rainfall, the retention tank takes in the rain, and its water level begins to rise.

The water storage chamber vacuumizes: When the retention tank reaches the maximum water level, the vacuum pump starts to vacuumize the water storage chamber, and the water in the retention tank is pressed into the water storage chamber under the action of atmospheric pressure. When contaminants deposit at the bottom of the water storage chamber and need to be cleaned, the retention tank will be emptied first. Open the flushing gate in the front of the tank by means of the PLC controlled hydraulic system, and the corridor begins cleaning.

Empty the retention tank: When necessary, start up the pump in the retention tank to evacuate. 

Flush the retention tank: After the retention tank is evacuated, start up the vacuum pump to destroy the vacuum in the water storage chamber. Water in the storage chamber will quickly rush into the flushing corridor by gravity, and the bottom of the retention tank will produce horizontal flushing waves to rinse the wastes effectively.

Performance and Advantages

1. No rotating equipment in the tank. Maintenance can be done outside the retention tank. No need to enter the tank.

2. High flushing head up to 7 meters. Effective flushing results, with the flushing scope up to 100 meters.

3. Fully automatic control. No need for hand operation.

4. The width of a single flushing corridor can be up to 9 meters.

5. No need for external water sources. Low energy consumption.