M&M Angle seat piston valves
M&M piston valves are manufactured in Italy, using the highest quality materials for a high quality product.
M&M piston actuated valves use an external control media to pilot the actuator, where a piston valve is directly connected to the main seal that closes onto the main orifice, thereby controlling the flow of liquids and gases.
The M&M International pneumatic angle seat piston valve is fast becoming the industry standard piston valve for water and steam applications due to its high quality, reliability and their compliance with ATEX certification.
M&M piston valves are highly recommended under these conditions:
Media containing dirt particles
Highly viscous media (up to 600 cST (80°E); 1 centistoke = 1 mm2/s)
High flow volumes
High temperatures
Damp environments or hazardous locations
The versions of M&M Piston actuated valves available are:
Technical Information
The main seal material used in piston actuated valves:
A modified PTFE has been used as the main seal material since 2004, when it replaced the original PTFE material seal.
The modified PTFE seal provides these benefits over the previous version:
Lower porosity and permeability
Fewer void spaces
Higher elasticity
Reduced deformation under load
Better chemical resistance to controlled media
Smoother surface and improved design flexibility
The standard bonnet seals consist of 2 'V'-shaped FKM gaskets and a package of 25% graphite-filled PTFE gaskets.
High temperature Piston actuated valves:
M&M can offer a piston valve that can be used up to 200°C, provided that the valve pressure limits are respected.
The main differences, in regards to the materials in this design, are as follows:
Change of the actuator material: From standard PA6 to PA66 filled with 30% fibreglass
All valves with DN > 25 with fixed plug design (to withstand turbulence caused by steam at high speed)
Special design of bonnet chevrons, all are made of 25% graphite-filled PTFE
10 Reasons to use a piston actuated valve:
