ProVac® Modular Vacuum Systems for Vacuum pressure die-casting

The ProVac® vacuum system consists of:

• High-speed vacuum valves of type ProVac® Standard (metal actuated) or Ultra (electrically actuated); Ultra can be supplied either with Typhoon vacuum runners or else special runners
• Special : One-sided ProVac® Ultra EASY and Ultra SONIC vacuum valve with unequalled aspiration capacity
• ProVac® chill vents and inserts
• High performance or lower-cost vacuum units for evacuation below 50 mbar with advanced analysis systems

The ProVac® modular vacuum system: high-performance and very reliable high-speed vacuum shut-off valves and long-life chill vents. 
The ProVac® Modular Vacuum System is available in four different sizes for each type of valve or chill vent, so offering an optimal choice for machines from 600 to 45,000 kN.  The type and size of valve are chosen to suit the volume of gas and the time available for its evacuation.
For each size, the mounting arrangement is exactly the same whether the metal-actuated valve, the machine actuated high-speed valve or the chill vent is chosen.  This makes it simple to change from valves to chill vents or vice-versa.

The ProVac® technology

There are three different types of ProVac® valves and chill vents:

1. Mechanical vacuum shut-off valves are the most effective way of obtaining a good vacuum in the cavity.  There is no need for a trigger signal, the valve closing when the advancing liquid metal front contacts a triggering piston and is diverted.
   
   
   
   
2. Machine-actuated high-speed valves offer the user the highest degree of control since they are actuated electronically.  They are recommended for large castings (ensuring that just a small part of the casting is not filled when the valve closes) and also for long production runs (a very fine adjustment of the closing position will bring durable advantages). This high-speed vacuum valve is a great solution for high-integrity vacuum die-casting. Notice particularly in this category the Ultra EASY or the Ultra SONIC vacuum valve, with unequalled suctioncapacity
   
   
   
   
3. The labyrinth chill vent is a shut-off valve with no moving parts.  It takes the form of a small auxiliary die fed with metal from the exit port(s) of the main die.  The faces of this auxiliary die are corrugated to form a labyrinth whose cross-section diminishes from entry to exit.  During the shot the gases are freely vented through this cavity, but when the metal enters it is rapidly chilled and solidifies before reaching the exit of the cavity, cutting off the vacuum. 

Machine locking force (kN)

600 - 4000

2000 - 8000

6000 - 20000

8000 - 30000

Trimmed part weight per die (kg)

0.1 - 0.8

0.5 - 4

2 - 8

3 - 15

Pro Vac® vacuum valves

Standard/Ultra
300

Standard/Ultra
1000

Standard PLUS/
Ultra 2000

Standard PLUS/
Ultra 3000

Dimensions of valves on fixed die
(HxWxD, in mm)

100x85x70

Standard-160x130x100
Ultra-135x130x100

160x130x100

170x140x120

Dimensions of valves on moving die
(HxWxD, in mm)

100x85x65

Standard-160x130x80
Ultra-135x130x80

160x130x80

170x140x100

Pro Vac® chill vents

CV300

CV1000

CV2000

CV3000

Dimensions
on fixed die (HxWxD, in mm)

160x85x60

160x130x60

220x130x60

220x180x60

Dimensions
on moving die (HxWxD, in mm)

160x85x50

160x130x50

220x130x60

220x180x60

Pro Vac® chill inserts

CV136

CV156

CV196

Dimensions
on fixed die (HxWxD, in mm)

100x36x35

100x56x35

100x96x45

Dimensions
on moving die (HxWxD, in mm)

100x36x40.3

100x56x40.3

100x96x45.3