Valve Automation versus Manual Valves – Learn the Difference
Posted in Uncategorised, on August 01, 2016 By Admin
Modern industrial cleaning equipment is not only high tech but also highly automated. This type of equipment is designed to rely on valves, which actuate remotely either by an automated control system or an operator. While the function of manual and automated valves may be basically the same, there are some differences.
Systems engineers are often challenged when requested to design automated valves for a specific application since several factors must be considered that would not apply for manual valves. This is one reason why you should always choose reputable valve suppliers in Canada. That way, you have confidence that the valve automation will be perfect from both a design and operation standpoint.
Typically, valves that are automated need the pressure of a gas or liquid that arrives at the inlet side to help keep them securely closed. Since most of these valves are closed anyway, the solenoid does not need to make any real effort. In the event that flow is required, the plunger is moved away from the orifice by the solenoid. This allows the proper flow to continue as long as the plunger is not close to the seat. The plunger will reseat itself and stop the flow through the valve once the solenoid is de-energized.
High-quality manual valves have a high performance and rugged design. Therefore, they are considered extremely reliable. These valves come in a range of sizes and are made for direct mounting. In addition, they offer outstanding protection from leaks due to a unique pyramidal stem system. With a maximum pressure between 800 and 1,000 psi and seats made of reinforced Teflon, manual valves are definitely not subpar in the performance category.
To better suit their location or environment, different handles can be attached to manual valves, such as oval and spring return. The only real drawback to manual valves is that they are difficult to monitor. For that reason, when making adjustments, dealing with hard-to-reach places, or in potentially hazardous environments, manual valves must be accessible.
On the other hand, automated valves offer easy operation and reliable performance. They offer all of the same options as manual valves, and you have peace of mind that comes with automation from electric and pneumatic modulating actuators. One key benefit of automation is
NEMA and solenoid certification. This certification means that valves that are automated can be used in environments that present hazards and corrosion.
The bottom line: automated valves are the preferred solution for heavy-duty and hazardous environments. In addition, these valves work incredibly well in modulating electric and pneumatic actuators, as well as for process control. In comparison, manual valves are the more cost-efficient solution and provide outstanding results when within reach in a nonhazardous environment.