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Tag Archives: Pneumatics

HOW TO USE A MOTORIZED BALL VALVE TO CONTROL AN IRRIGATION SYSTEM

If you have an elaborate irrigation system for a vegetable garden, you may want to install a motorized ball valve or several of them for a variety of reasons.  The benefits include better convenience, faster control and safer operation compared to more basic set-ups.  For example, a motorized ball valve can be used as an emergency shut-off, if it is installed at the point where the water source connects to the irrigation system.  For many users, this is the place where the garden hose connects to the PVC pipe that feeds into the drip lines.

valve 4

Furthermore, a motorized ball valve is useful as a control mechanism to shut off sections of the garden that may not need water or to prioritize which plants get watered during a drought.  What’s more, a motorized ball valve can help quickly relieve pressure in the irrigation system; excess pressure can cause irrigation pipes to burst.

valve 5

The ultimate benefit of using a motorized ball valve over the basic manual control valve is convenience.  The motorized version allows you to hook up an external on/off switch that you can place somewhere that is easy to reach — near the electrical outlet, in your garage, etc — so that you can control your system remotely.

valve 1 SKU# D1151096

For this example, Deelat’s motorized electric ball valves can be installed to control the irrigation system between a garden hose (connected to the house’s spigot) and the irrigation system.  Among the models suited for this purpose are motorized electric ball valves that consist of a 24V AC on/off actuator and a 2-way brass or stainless steel valve.

valve 3  SKU# D1156046

First you will have to select a motorized electric ball valve that matches the size of the PVC pipe you are using for your irrigation system.  There are a wide variety of couplers and adapters to connect brass or stainless steel to PVC, and you may also need an adapter to connect your garden hose to the valve if there is a size difference.

The actuator has 3 wires:

  1. Blue Wire = Negative/Neutral

The blue wire is continuously connected to the 24V transformer’s neutral connection.

  1. Brown Wire = Positive

The brown wire is continuously connected to the 24V transformer’s line connection.

  1. Black Wire = Controlling wire which is also Positive

The black wire connects to the 24V transformer’s line connection through a switched connection.

The valve opens when the switched connection is completed between the black wire and the 24V transformer’s line connection.  When this switched connection in broken, the valve closes.

valve 5

Follow these steps to complete the set-up:

  1. Install the actuator on the valve.
  2. Attach the actuator’s blue wire directly to the neutral connection on the transformer.
  3. Attach the actuator’s brown wire directly to the line connection on the transformer.
  4. Attach the black wire directly to the light switch (either connection is fine).
  5. An additional wire is needed to connect the other connection on the light switch to the line connection on the transformer.

If the connections are done properly, you can test the unit by plugging the 24V transformer into an outlet and flipping the light switch, which should close the valve.  Flip the switch to the opposite side and the valve should open again.

valve 7

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Air Rivet Guns: Common Applications, Types and Features

Solid rivets are a widely used fastener in industrial applications for strongly binding together an assembly. They’re typically used in aircraft and automotive manufacturing, as they are more durable and create a more sturdy binding than a screw and nut. The process of “setting” a solid rivet requires a specialized tool called an air rivet gun.

Air rivet guns work by driving the rivet into place. The process begins by inserting the rivet into a pre-drilled hole, with the protruding end, called the shank, backed up by a “bucking bar.” Then, as the rivet head is driven with the rivet gun, the back end is deformed, creating a “shophead.” In the process, the rivet swells in the hole, creating an extremely tight bond.

Air Rivet Gun
Air Rivet Gun

There are numerous types of hydraulic and air-powered rivet guns, and they all have different capabilities. Some are slow-hitting, striking the rivet head with 2,500 hits-per-minute, or fast-moving, which is up to 5,000 hits-per-minute. Slow-hitting air rivet guns, which are sometimes called pneumonic hammers, are one of the most common types used in industry. Additionally, these guns are also determined by their size, shape and their ability to drive certain sizes of rivets. For example, a 2X rivet gun, which is on the lower end of the spectrum, can reliably drive 1/8” and 3/32” rivets, but it is not powerful enough to drive 1/4″ rivets.

Factors to Consider When Selecting a Rivet Gun

Air rivet guns provide controlled hitting of the rivet head. They differ from other types of air-powered devices like an air hammer or air chisel, which strike too hard and too fast to be used in riveting. These types of tools can quickly damage or dent the sheet metal around the rivet.

Air Hydraulic Riveter
Air Hydraulic Riveter

Choosing the correct type of air rivet gun can be a complicated process. You should consider:

  • Hitting speed: Hitting speed is the rate at which the rivet gun strikes the head of the rivet. Typically slow-hitting rivet guns – in the range of about 2,000 hits-per-minute – provide a greater degree of control, compared to fast-hitting guns. In addition, the fast-hitting rivet guns create more force, but aren’t typically necessary for smaller sizes of rivets.
  • Size and Capacity: Capacity is one of the most important factors to consider. In general, this refers to the rivet gun’s ability to drive rivets of a certain diameter. For example, quarter-inch rivets or M6 rivets require a gun with a greater capacity to be properly set. This is generally measured in pulling power or RPM. The larger the rivet’s diameter, the greater the capacity of the gun will need to be.
  • Stroke Length: This is the distance that the rivet gun’s driving head takes each time it hits the rivet. Some guns are adjustable, and there are also extension pieces available to increase the stroke length. Stroke length is important for applications in confined spaces, like a rivet that is attached within a protected hole.
  • Rivet Set Sizes: You must match your rivet gun to the size of the rivet that you will be setting. There are two different types of measurements – Imperial and Metric. For example, an M6 air rivet gun can be used to drive M6 rivets. (This is the metric diameter of the rivet head, which is 6mm.) In general, many rivet guns are adjustable, allowing the operator to interchange heads to fit the type of rivet. To be safe, a rivet gun set with a range of sizes is a solid investment.

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