Ball Valves

A ball valve is a type of rotary valve where flow is controlled by a spherical ball that rotates within a ball seat, operated by a handle (see figure 9). Typically, ball valves are either two-port or three-port, and they allow flow when the ball’s passageways align with the ports in the valve body and seat. These valves are simple in design and come in a wide range of sizes, configurations, and pressure ratings (up to 1000 bar or 15,000 psi). Although they can be partially opened to throttle flow, a key advantage of ball valves is their minimal flow restriction when fully open, providing a nearly straight-through flow path. This characteristic makes them ideal for applications like pump suction lines, where they can isolate the pump for maintenance while offering minimal resistance to flow, thus reducing the risk of pump cavitation Poppet Valves

Automotive Lift Repair Tampa Florida Poppet valves control flow using a ball or conical poppet that moves against or away from a seat, as illustrated. These valves are typically available as two-way or three-way types, though two valves can be combined in a single body to create a four-way function. Because the valve blocks flow through metal-to-metal contact of the poppet against the seat, poppet valves are nearly leak-proof, often eliminating the need for separate load-holding valves (such as those used to prevent creep in a vertically loaded cylinder). The absence of clearance between moving parts makes poppet valves less prone to issues from fluid contamination, although large contaminants can still affect valve seating or damage the poppet or seat. Opening the valve generally requires a significant amount of force on the valve stem to overcome the pressure force, which results in relatively low flow ratings. However, poppet valves can achieve pressure ratings of up to 350 bar (5000 psi) and beyond.

In this application, it is crucial to use a valve with nearly leak-proof characteristics to prevent leakage from the lift cylinder during normal operation. However, poppet valves typically provide only open or closed positions, offering limited control over flow regulation and, consequently, the speed of lowering. If precise flow control is needed, an additional restrictor or needle valve may be required in the system.

Automotive Lift Repair Tampa Florida Rotary Shear Valves

Rotary shear valves transmit flow from one port to another through connections in a flat plate, as depicted in figure 13. Each port has a seat that is hydraulically pressed against the flat plate, and with precise manufacturing, an optically flat connection can be achieved between the two components. While no directional valve can be truly described as ‘leak-proof,’ the rotary shear valve comes closest to achieving a leak-proof operation.

To change the direction of airflow between a cylinder, a directional control valve is required. These valves have internal components that allow for connecting and disconnecting flow passages within the valve body. End actions provide users with complete control over the airflow direction.

Pneumatic Valves

A typical Automotive Lift Repair Tampa Florida directional control valve consists of a valve body with four internal passages for airflow (inside the sliding spool and valve body). By moving the spool, it creates connections to the cylinder ports responsible for supplying pressure. When the spool is in one position, supply pressure connects directly to the A and B ports and exhaust ports, causing the cylinder to extend. When the spool is shifted to the other extreme position, the supply pressure reverses, making the cylinder retract. Directional control valves in circuits enable a cylinder’s piston to perform work, extend, and retract.

Automotive Lift Repair Tampa Florida Directional control valves (DCVs) are classified based on their flow paths under various operating conditions. Key factors include the number of ports, the total number of flow paths, and the configuration of internal port connections.

– Two-way directional valves provide on-off functions.

– Four-way valves are the most common and are used for causing reversible motions.

– Five-port valves are similar to four-way valves but include individual exhaust ports.

A pneumatic solenoid valve is distinguished by its unique features and properties. Typically, a solenoid refers to coils that generate magnetic fields when wrapped around a magnetic core or object. This mechanism is essential for converting energy into motion. The valve’s operation is governed by the solenoid’s actions and the flow of fluid or air.

Pneumatic Valves

Automotive Lift Repair Tampa Florida Solenoid valves are commonly used in pneumatic systems, often in combination with pneumatic valves. When used together, they form a piloted valve system, where the larger solenoid valve controls the smaller pneumatic valve. The pneumatic valve then functions as the air cylinder within the main valve. This setup is sometimes referred to as a compressed air pilot valve.

Piloted valves offer several benefits, including low operational costs and reduced energy consumption. They enhance machine efficiency while minimizing power and energy use.

We offer a comprehensive range of:

– Pneumatic timers

– Pneumatic indicators

– Pneumatic counters

– Pneumatic cylinders

For more information about our parts and services, contact Automotive Lift Repair Tampa Florida today. Our skilled engineering team can help you find the ideal components for your specific needs.

Many industries benefit from implementing total pneumatic control systems due to their numerous advantages. Transitioning to a fully pneumatic control system can enhance both economic efficiency and operational effectiveness. Below are some key reasons why a total pneumatic control system is often more practical than electro-pneumatic actuation:

Automotive Lift Repair Tampa Florida Pneumatic Valves

– Reduced Overall Cost: As outlined below, the benefits of a total pneumatic control system contribute to significant cost savings for businesses.

– Fast Response Time: Pneumatic control systems generally offer faster response times compared to electro-pneumatic systems, especially in compact setups.

– Better Reliability and Longer Life: The simplicity of a total control system reduces the likelihood of malfunctions, and pneumatic controls are less prone to self-destruction.

– No Need for Solenoid Valves: Pneumatic systems are more compact compared to their electrical counterparts, eliminating the need for additional solenoid valves.

– Best for Short Stroke Cylinders: Pneumatic systems are well-suited for clamping cylinders with short strokes, which are detected by pneumatic limit sensors.

– Uniform System: Utilizing a single power source streamlines operation, design, and maintenance.

– Eliminated Electrical Power Sources: Removing electrical components enhances workplace safety and reduces overall energy costs.