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MT 156

- Practical exercise based on the assembly of a  wedge gate valve and an angle seat valve1
- Comprehensive and well-structured instructional material


Technical Description

Wedge gate valves are used as fittings for water, water vapour, oil and other non-aggressive liquids. Operating temperatures of up to 200°C are possible. Wedge gate valves in this design are operated by a  hand-wheel turned spindle. During closing, the slider is pushed by the spindle nut into the sealing rings in the housing.  

Angle seat valves are the typical fittings used in drinking water pipes. Angle seat valves are also used in many areas of industry. They are designed for neutral fluids and gaseous media. Stainless steel versions are suitable for mildly and highly aggressive media. The valves can be used for high flow rates, and are non-sensitive to lightly contaminated and high-viscosity media. The valve spindle is usually arranged at a 45° angle to the direction of flow. Angle seat valves generate substantially lower pressure loss than screw down valves or corner valves owing to the less tortuous flow path of the fluid.

The MT 156 practice kit forms part of the GUNT assembly, maintenance and repair practice line designed for training at technical colleges and in company training centres. A close link between theory and practice is key to the learning content.

MT 156 enables two typical industrially relevant valves and fittings to be assembled and disassembled. Students become familiar with all the components and their modes of operation. The parts are clearly laid out and well protected in a tool box. Systematic assembly and disassembly of the valves is practiced. The accompanying material details the individual steps involved in assembly, and provides additional information on the areas of application, mode of operation and design of the valves and fittings.

Learning Objectives / Experiments

- design and function of a wedge gate valve
- design and function of an angle seat valve
- assembly and disassembly, including for the purposes of maintenance and repair
- replacing components (e.g. seal)
- comparison of 2 different valves and fittings
- reading and understanding engineering drawings and operating instructions
- leak testing (together with hydraulic valves and fittings test stand MT 162)



[1] learning concept for assembly exercises on valves and fittings
[2] wedge gate valve with hand wheel, as set of parts
[3] angle seat valve with manual drive, as set of parts 
[4] complete assembly tool kit
[5] valve parts and tools housed in a sheet-steel tool box
[6] the kit forms part of the GUNT assembly, maintenance and repair practice line

Technical Data

Wedge gate valve with flange connections
- DN40, PN10
- materials  
  housing, cover, taper: grey cast iron  
  spindle, sealing surfaces of housing and taper: 
  stainless steel  
  packing rings: graphite
Angle seat valve with flange connections
- DN25, PN16
- materials  
  housing: stainless steel  
  metallic inner parts: stainless steel  
  seals: PTFE

Dimensions and Weight

LxWxH: 720x360x310mm (box)
Weight: approx. 35kg 

Scope of Delivery
1 complete set of wedge gate valve parts 
1 set of replacement parts, consisting of:
- 3x flat seal
- 3x packing gland seal
- 2x packing gland
1 complete set of angle seat valve parts 
1 seat seal for angle seat valve
1 set of tools, consisting of: 
- 1 combination wrench, size 10
- 4 single-end wrenches: size 24, 30, 2x 17
- 2 open-ended wrenches: size 27, 50
- 1 Allen key, size 2,5
1 set of bolts, nuts, washers
3 rectangular boxes for small parts
1 sheet-steel tool box with foam inlay
1 set of instructional material, consisting of: 
  technical description of system, complete set of drawings with individual parts and parts list, description of assembly and disassembly processes, also in relation to repair operations

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