Shutter Valve for the Difficult Applications
MH Koltek Valve
MH52 with handle. MH53 with actuator, type KH631.

Application

MH Koltek valve is a manually or pneumatically operated valve, designed for use in the food, chemical, pharmaceutical and other industries where valves of sanitary design are needed.

Working principle

A PTFE shutter is operated by means of a handle or an actuator. A spring system presses the shutter against the inside cylindrical surface of the valve body thus ensuring complete tightness.

The air actuated valve can be fitted with ThinkTop® or a laterally fitted indication unit for remote indication of the valve position. The manually operated valve can be fitted with laterally indication units (used for LKLA actuators). The actuator for the valve comes in two versions, single acting or double acting. The single acting actuator operates with one main piston whereas the double acting actuator operates with two main pistons.

Standard Design

The valve consist of a rigid body with an internal cylindrical bore and 2 or 3 ports for pipe connection. The two lids have guide rings or bearings for an internal shaft which supports and positions the shutter. The stainless steel handle or the actuator is fitted to turn the shaft.

The actuator consists a system of cylinders and one or two main pistons interconnected with a toothed bar which interacts with a gear wheel on the valve shaft. The system is insensitive to pressure shocks in the valve.

The valve has welding ends as standard.

Actuator functions

Actuator type 630:
- for 25 mm to 76.1 mm valves only
- two positions
- spring/air
- turning angle 1x90°

 Pneumatic connections
Sizes 12.7-51mm/DN25-50:
Sizes 63.5-76.1mm/DN65:
Double acting actuator

Actuator type 631:
- two positions
- air/air
- turning angle 1x90°

  
Sizes 12.7-76.1mm/DN25-65:

 

Sizes 101.6mm/DN80-100:
Double acting actuator

 

  

Actuator functions

Actuator type 632:

  • - two positions
  • - air/air
  • - turning angle 1x180°

 

  
Sizes 12.7-76.1mm/DN25-65: Pneumatic connections
Sizes 101.6mm/DN80-100:
Double acting actuator

Actuator type 633:

  • - three positions
  • - air/air
  • - turning angles 2x90°

 

  
Sizes 12.7-76.1mm/DN25-65:
Sizes 101.6mm/DN80-100:
Double acting actuator

Pressure drop/capacity diagrams



 

Note! For the diagram the following applies:
Medium: Water (20°C).
Measurement: In accordance with VDI 2173.

Dimensions (mm)
MH valves:

Size 25 38 51 63.5 76.1 101.6 25 40 50 65 80 100
  mm mm mm mm mm mm DN DN DN DN DN DN
A1 116 149 161 179 204 292 116 150 161 204 272 292
B 65 90 102 118 137 195 65 90 102 137 174 195
OD 25.4 38.1 50.8 63.5 76 101.6 29 41 53 70 85 104
ID 22.1 34.8 47.5 60.2 72 97.6 26 38 50 66 81 100
t 1.65 1.65 1.65 1.65 2 2 1.5 1.5 1.5 2 2 2
E 42 56 62 70 80 117 42 56 62 80 107 117
G 55 70 82 105 110 155 64.5 80 82.5 100.5 115.5 130.5
K 130 130 180 180 235 330 130 130 180 235 330 330
M/DIN male             22 22 23 25 25 30
M/SMS male 15 20 20 24 24 35            
Weight (kg) 1.8 3.3 4.8 6.9 10.5 25.0 1.8 3.3 4.8 10.5 22.0 25.0

Actuators

Size   25mm 38mm 51mm 63.5mm 76.1mm 89mm 101.6mm
    DN25 DN40 DN50   DN65 DN80 DN100
A2   170 170 170 172 178 194 194
A3   233 260 273 290 315 369 389
H1 KH630 57 57 57 285 285    
H1 KH631 57 57 57 57 57 119 119
H1 KH632 95 95 95 95 95 194 194
H1 KH633 95 95 95 95 95 281 281
H2 KH630 326 326 326 285 285    
H2 KH631 119 119 119 119 119 119 119
H2 KH632 157 157 157 157 157 194 194
H2 KH633 243 243 243 243 243 281 281
H3   43 43 43 43 43 43 43

Caution, opening/closing time:

Opening/closing time will be affected by the following:

  • - The air supply (air pressure).
  • - The length and dimensions of the air hoses.
  • - Number of valves connected to the same air hose.
  • - Use of single solenoid valve for serial connected air actuator functions.
  • - Product pressure.

 

a. MH53 with handle. b. MH53 with actuator, type KH631.
Fig. 1. Dimensions.  

Air Connections

Compressed air:

R 1/8" (BSP), internal thread.

Technical data

Max. temperature: 110°C.
Max. pressure against shutter: 300 kPa (3 bar).
Max. pressure behind shutter: 1000 kPa (10 bar
Air pressure for actuator: Max. 800 kPa (8 bar).Min. 500 kPa (5 bar).

Materials

Product wetted steel parts: Acid-resistant steel 1.4404 (316L.)
Finish: Ra ≤0.8 µm.
Product wetted seals: Shutter in PTFE.EPDM.
Actuator seals: Nitrile (NBR).

Options

  • - Male parts or clamp liners in accordance with required standard.
  • - ThinkTop®.
  • - Bottom lid for hot water or steam heating.
  • - Bottom fitted indication unit.
  • - Limit stop for manual valve.
  • - Pilot valve, type L or T (for actuator type 633). Type L is used when two ThinkTop® units are used.
  • - Rebuilding to double acting value for high viscosity product or quick operation.
  • - Product wetted seals of Nitrile (NBR) or Fluorinated rubber (FPM).
  • - Shutter in reinforced PTFE (max. 130° C together with seals in EPDM or FPM).

Ordering

Please state the following when ordering:

  • - Koltek valve; manual or pneumatic.
  • - Size.
  • - Number of ports; 2 or 3.
  • - Connections, if not welding ends.
  • - Type of actuator (if applicable).
  • - Options.

Note!

For further details, see also instruction IM 70735.

Bottom fitted indication units*
(together with bracket for indication unit)

Actuator type KH630 KH631 KH632 KH633
Indication unit
LKLA
(lateral indication unit)		 1 pcs. 1 pcs. 2 pcs.** 2 pcs.**
*) Not possible in combination with heated lid.
**) Not suitable for micro switch.

Note! For all manually operated valves: Use LKLA indication units.