MK 800 Dynamic Mixing Heads

Many Improvements – One Aim: Maximum Precision

Reliable Mixing and Dosing

Experience and precision in every machine component

A mixing head for processing two or three components has three essential functions. Firstly, the precise dosing of two components into the mixing chamber at the specified mixing ratio through the built-in valve technology. Secondly, the components are homogeneously mixed within the mixing chamber by the servo-controlled agitator. Then the material is applied precisely onto the part through the dosing nozzle.

For material systems with simple mixing ratios and generous processing tolerances, static mixing is often enough. Here, the two material components only need to be pressed through a mixing tube in the correct quantity ratio. The material flow is then swirled by the inside structures of the mixing tube to such an extent that sufficient mixing occurs.

Dynamic Mixing Makes the Difference

The greatest possible level of material homogeneity after mixing 2-component material systems with different viscosities – even in the case of demanding, asymmetrical mixing ratios – can only be achieved with dynamic mixing. Static mixers are capable of swirling material components of similar viscosity during continuous dosing. These can be used for material systems that allow generous deviations in the mixing ratio and react comparatively slowly, thereby preventing material that has already stuck together in the mixing tube from collecting and forming a blockage.

The dynamic mixing head is totally different. For example, it enables dosing from 0.2 to 100 g/s with continuously adjustable mixing ratios from 100 : 1 to 1 : 100 and a dosing accuracy of ±1%. In the case of fast-reacting material, the mixing chamber can also be rinsed regularly – in the case of the MK 800 series with the patented high-pressure water rinsing process!

Overview

The New MK 800 Mixing Head Series

Many improvements – one aim: maximum precision

OPTIONS	IMPROVEMENTS	MK 800 BASIC	MK 800 PLUS	MK 800 PRO
Mixing chamber temperature sensor	Unchanged		S	S
Mixing head cooling system by means of a peltier module (mixing chamber / intermediate housing)	NEW! Own circuit instead of split circuit Benefit: Easier to maintain		O	O
Mixing head temperature control by means of the temperature control unit (mixing chamber / intermediate housing)	NEW! Temperature control additionally also for intermediate housing instead of only the mixing chamber Benefit: Higher efficiency		O	O
Manual stroke adjustment by means of adjusting wheel	NEW! Via adjusting wheel instead of with feeler gauge Benefit: Improved adjustability	S	S
Automatic stroke adjustment by means of stepper motor	NEW! Stepper motor Benefit: Fully automatic adjustment			S
Sensor-monitored axial position of the agitator shaft	NEW! Detects whether the mixing chamber, agitator and nozzle are installed correctly, detects signs of wear Benefit: Preventive maintenance			S
Recirculation valve with manual pressure adjustment / manual pressure regulator	NEW! Manual pressure regulator instead of preloading screw on the valve Benefit: Improved adjustability	O
Recirculation valve with automatic pressure adjustment / electronic pressure regulator	Unchanged: Electronic pressure regulator		O	O
Version with stub valve	Unchanged	O	O	O
Material pressure measurement directly on the valve	NEW! In the basic version (unchanged from plus and up)	S	S	S
Needle stroke measurement on the dosing and recirculation valve	NEW! Documents i/o functionality of the valve and signs of wear, if applicable Benefit: Preventive maintenance			S

S - Standard features
O - Optional features

MK 800 BASIC

MK 800 / MK 825 BASIC Mixing Heads

2- / 3-component-mixing head with high-pressure water rinsing and dynamic mixing

TECHNICAL DATA*

	MK 800 BASIC	MK 825 BASIC
Dimensions (H x B x D) 2C mixing head	248 x 237 x 151 mm	248 x 237 x 151 mm
Dimensions (H x B x D) 3C mixing head	248 x 237 x 219 mm	248 x 237 x 219 mm
Operating pressure	up to approx. 20 bar	up to approx. 20 bar
Discharge rate	3.0 g/s to 100 g/s	0.2 g/s to 3.0 g/s
Dispense accuracy	± 1 %	± 1 %
Mixing head weight for 2 components	approx. 5.5 kg	approx. 5.5 kg
Mixing head weight for 3 components	approx. 6.7 kg	approx. 6.7 kg
Mixing ratio	of 100 : 1 to 1 : 100 continuously adjustable	of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed	from 1 – 6 ,000 U/min	from 1 – 6 ,000 U/min

* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements

Rear View of mounting bracket and valve cluster

Description

2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting
High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection
Alternative component rinsing (for the use of non-reactive components)
Hydromechanically regulated precision recirculation valves for precise dosing
Can also be equipped with stub lines for bonding or potting applications
Weight-reduced construction of a modular design, blue-gray anodized
Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel

Adjusting wheel for stroke adjustment of the nozzle shut-off system DVS 3

Direct stack injection of the components
Electronically adjustable mixer speed
Special mixer design enables gentle material mixing
Blowing air needle valve for drying the mixing system
Low-drip, low-maintenance nozzle shut-oﬀ system STOP-DROP DVS 3
DVS 3 stroke can be easily adjusted by means of an adjusting wheel
Material pressure measurement on the dosing valve

Optionally also available in a version with stub valves

Options

Mixing head housing made of chrome steel
Customer-specific outlet nozzles
Spraying system

MK 800 PLUS

MK 800 / MK 825 PLUS Mixing Heads

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing, dynamic mixing and mixing chamber temperature sensor

Technical Data*

	MK 800 Plus	MK 825 Plus
Dimensions (H x B x D) 2C mixing head	248 x 204 x 151 mm	248 x 204 x 151 mm
Dimensions (H x B x D) 3C mixing head	248 x 204 x 202 mm	248 x 204 x 202 mm
Operating pressure	up to approx. 20 bar	up to approx. 20 bar
Discharge rate	3.0 g/s to 100 g/s	0.2 g/s to 3.0 g/s
Dispense accuracy	± 1 %	± 1 %
Mixing head weight for 2 components	approx. 5.5 kg	approx. 5.5 kg
Mixing head weight for 3 components	approx. 6.7 kg	approx. 6.7 kg
Mixing ratio	of 100 : 1 to 1 : 100 continuously adjustable	of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed	continuously adjustable from 1 – 6,000 rpm	continuously adjustable from 1 – 6,000 rpm

* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements.

Rear view of mounting bracket and valve cluster

Description

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting processes
High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection
Alternative component rinsing (for the use of non-reactive components)
Servopneumatically and hydromechanically controlled precision recirculation valves for precise dosing
Can also be equipped with stub lines for bonding or potting applications
Weight-reduced construction of a modular design, blue-gray anodized
Size-optimized, functional V design to increase the degrees of freedom
Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel

Adjusting wheel for stroke adjustment of the nozzle shut-off system DVS 3

Direct stack injection of the components
Electronically adjustable mixer speed
Special mixer design enables gentle material mixing
Blowing air needle valve for drying the mixing system
Low-drip, low-maintenance nozzle shut-oﬀ system STOP-DROP DVS 3
DVS 3 stroke can be easily adjusted by means of an adjusting wheel
Material pressure measurement on the dosing valve
Mixing chamber temperature sensor

Optionally also available in a version with stub valves

Options

Mixing head housing made of chrome steel
Customer-specific outlet nozzles
Spraying system
Mixing head temperature control

MK 800 PRO

MK 800 / MK 825 PRO Mixing Heads

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing, dynamic mixing and sensor-monitored needle position of the dosing valve.

Technical Data*

	MK 800 PRO	MK 825 PRO
Dimensions (H x B x D) 2C mixing head	272 x 204 x 150 mm	272 x 204 x 150 mm
Dimensions (H x B x D) 3C mixing head	272 x 204 x 202 mm	272 x 204 x 202 mm
Operating pressure	up to approx. 20 bar	up to approx. 20 bar
Discharge rate	3.0 to 100 g/s	0.2 to 3.0 g/s
Dispense accuracy	± 1 %	± 1 %
Mixing head weight for 2 components	approx. 5.5 kg	approx. 5.5 kg
Mixing head weight for 3 components	approx. 6.7 kg	approx. 6.7 kg
Mixing ratio	of 100 : 1 to 1 : 100 continuously adjustable	of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed	continuously adjustable from 1 – 6,000 rpm	continuously adjustable from 1 – 6,000 rpm

* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements

Stepper motor for automatic adjustment of the nozzle shut-off system DVS 3

Description

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting processes
High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection
Alternative component rinsing (for the use of non-reactive components)
Servopneumatically and hydromechanically controlled precision recirculation valves for precise dosing
Can also be equipped with stub lines for bonding or potting applications
Weight-reduced construction of a modular design, blue-gray anodized
Size-optimized, functional V design to increase the degrees of freedom
Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel
Direct stack injection of the components
Electronically adjustable mixer speed
Special mixer design enables gentle material mixing
Blowing air needle valve for drying the mixing system
Low-drip, low-maintenance nozzle shut-oﬀ system STOP-DROP DVS 3
DVS 3 stroke adjustment is automatically carried out via the control system
Sensor-monitored axial position of the agitator shaft
Material pressure measurement on the dosing valve
Mixing chamber temperature sensor
Sensor-monitored needle position of the dosing valve

Options

Mixing head housing made of chrome steel
Customer-specific outlet nozzles
Spraying system
Mixing head temperature control

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