How does Pneumadyne determine the Cv rating?

All Pneumadyne Cv ratings are determined in accordance with ANSI / (NFPA) T3.21.3, Pneumatic fluid power flow rating procedure and reporting method for fixed orifice components. Cv is useful for system sizing and as a component comparison standard, particularly when all Cv's are provided by the same manufacturer.

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What is closed cross-over and why is it an advantage?

A closed cross-over valve features a stem and poppet that work in conjunction with one another ensuring that the poppet seals the exhaust port before the valve opens to flow. There is no transitional state from one function to the next providing the operator precise control between positions.

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What is a 2-Way valve?

A 2-Way directional control valve provides an on / off function. Actuating the valve allows air to flow from the input port and out the output port.

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What is a 3-Way valve?

A 3-Way directional control valve pressurizes and exhausts a port. When a 3-Way normally closed valve is actuated air flows through the input port and out the output port. In the unactuated position, air flow travels from the output port through the exhaust port.

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What is a 4-Way valve?

A 4-Way directional control valve pressurizes and exhausts two ports (the valve body consists of 5 ports). A 4-Way valve has four distinct flow paths within the valve and is commonly used to cause reversible motion of a cylinder or motor. Actuating the valve directs flow through input port 1 to output port 4 as output port 2 exhausts through port 3. In the unactuated position, air flow is directed through input port 1 to output port 2 as output port 4 exhausts through port 5.

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What is Normally Open?

Often referred to as normally passing, air flows from the input port to the output port in the unactuated position.

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What is Normally Closed?

Often referred to as normally not passing, air flow is blocked at the input port in the unactuated position.

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What is the advantage of the tapered thread?

Pneumadyne's tapered thread design eliminates the need for a soft seal undercut at the base of the fitting and produces a seal similar to pipe thread. The absence of the undercut also allows for a larger than normal orifice permitting more flow.

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Are the nylon toggles and push buttons recommended for use in rugged applications?

Pneumadyne push button and toggle actuators are specially designed and molded from a high quality nylon material with a long service life (all actuators are included with the valve).
Nylon actuators are available in seven colors, excluding the nylon ball, making it possible to color code operations.

Pneumadyne buttons are convex rather than concave, a shape with many advantages. Ideal for medical and dental applications, convex buttons are easier to keep clean - no well to trap liquids or debris. The convex shape also ensures a full contact fit for smooth actuation when used with cam operators. A slip resistant texture on the surface of the button provides grip for manual operation and guide ribs on the stem of the button ensure proper alignment. This prevents it from disrupting the exhaust path while absorbing moderate sideloads.

Pneumadyne toggles are available for momentary or detented actuation.

Pneumadyne actuators are retained by a specially designed stainless steel roll pin which expands to the diameter of the pin hole and holds the actuator in place. The service life of our actuator is extended by the use of the roll pin producing a fit that will not come out of place.

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Are Cad drawings of Pneumadyne products available for use?

Catalog drawings are available in pdf format in our online catalog. Clicking the thumbnail image of the desired product will return additional product information, which includes a link for the catalog drawing. Contact our engineering team for catalog drawings in alternative file formats.

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What is the minimum output pressure for the regulators?

The minimum output for Pneumadyne regulators is 10 - 15 psi.

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What is the life expectancy of Pneumadyne valves?

Pneumadyne components are designed and manufactured to ensure long product life. Several of Pneumadyne's valves have been customer tested to millions of cycles. The "0" Series valve has exceeded 40 million cycles without failure.

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Can Pneumadyne valves be used in vacuum applications?

Several valve configurations are ideal for use in vacuum applications. Contact our Customer Service department for valve selection.

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Are optional seal materials available for valves and fittings?

Buna-N is the standard material used in Pneumadyne components. Optional seal materials are available upon request.

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What is the advantage of the push-in port in the Pneumadyne valves?

Incorporating the push-in style ports allows for quick connection and disconnection of ¼ OD and 5/32 OD tubing.

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What is System 11?

Pneumadyne's System 11 is a method of consolidating 2 to 10 components with a common pressure source. Components available for placement on the System 11 manifold include "11" Series Regulators, Valves and Needle Valves. All products feature swivel output porting for alignment convenience.

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What is a Pressure Control Valve?

The Pneumadyne Pressure Control Valve is ideal for applications requiring reduced pressure to a cylinder. It is designed for use between a valve output and a cylinder or other volume, where a reduced pressure is desired. A high volume check valve is built in to allow for rapid reverse flow. It is also ideal for continuous flow applications where reverse flow is not required.

Output pressure is selected by adjusting the control knob when pressure is off. Pneumadyne's gauge port and micro gauge are ideal for accurately setting output pressure. Air flowing through the input port unseats the poppet and continues through the output port, pressurizing a downstream vessel. The flow stops when the downstream pressure is equal to the set pressure. As the cylinder retracts the Pressure Control acts as a free reverse check, downstream pressure enters the output port unseating the o-ring and allowing air to pass through the hollow stem and out the input port.

The Pressure Control valve is not to be used as a Pressure Regulator.

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Why choose a Pressure Control valve instead of a Pressure Regulator?

Pressure Control valves are ideal for applications requiring a reduced pressure to a cylinder whereas Pressure Regulators are used to maintain a downstream settable pressure.

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Can Pneumadyne Regulators be preset with a maximum output pressure?

Preset Regulators are available upon request.

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When should a non-relieving regulator be used?

For safety reasons non-relieving regulators are recommended for use with liquids only and with adequate means of downstream relief.

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Can Pneumadyne valves be used with water?

Pneumadyne valves can be used in water applications. Contact Customer Service for use in potable water applications.

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How does the 3-Position Valve work?

This dual function product contains two valves in one body with a common input and common exhaust. When the toggle is centered in the 2-Way configuration all ports are blocked, in the 3-Way configuration both output ports are open to exhaust.

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Why are Pneumadyne products anodized or plated?

Pneumadyne uses a variety of metal finishes, chemical finishes and anodizing to enhance our product line. The plating process provides corrosion resistance and the result is a pleasing appearance.

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What is a Shuttle valve?

A shuttle valve is a simple device but also a necessary part of many pneumatic systems. It is a passive device having no air supply (power supply) of its own. Shuttle valves are used when signal is required to be selected from two or more different sources. Also known as "OR" valves, they allow a signal to pass through from either input A or B (or both) and will allow the reverse flow of system exhaust through these same inputs. A shuttle valve selects the higher of two pressures, a function that is to be considered when designing circuitry.

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What is an "AND" valve?

"AND" valves are used in circuit control applications that require a combination of inputs to produce a single output. When a signal is supplied to input ports 1 and 3 the output flows from port 2. The output flow will always be the lower of the two pressures. Both input pressures are required to receive an output signal from the valve (loss of input will cancel the output signal).

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What is an "OR" valve?

"OR" valves are commonly known as Shuttle valves.

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