High pressure Regulating Hydraulic Relief Valves
Hydraulic Actuated Control Valve Introduction:
A regulating hydraulic pressure relief Modulating Valve is actuated by line pressure through a pilot control system, opening fast to maintain steady line pressure but closing gradually to prevent surges. Operation is completely automatic and pressure settings may be easily changed. This Valve can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a bypass system.If a check feature is added, and a pressure reversal occurs, the downstream pressure is admitted into the main valve cover chamber, closing the valve to prevent return flow.
Applications:
Regulating Throttle Valve is widely used in industries such as natural gas, oil, chemical, metallurgy, paper-making, electricity, mining, printing and dyeing, biopharmaceuticals, daily chemicals, food and beverage, water treatment, and air handling for fluid automatic control or regulation. They are commonly used in conjunction with automated pneumatic instruments.
Principle:
1. In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem.
2. When the hand wheel is turned counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom makes the ball disengage from the valve seat.
3. The valve stem continues to lift and interacts with the guide pin in the helical groove of the valve stem, causing the ball to start rotating without friction.
4. Until it reaches the fully open position, the valve stem is raised to the limit position, and the ball rotates to the fully open position.
High pressure Regulating Hydraulic Relief Valves Feature：
- Pressure Regulation: The primary function of these valves is to regulate the pressure within a hydraulic system. They are designed to open and relieve pressure when it exceeds a predetermined set point, thereby protecting the system from damage.
- Set Pressure Adjustment: High-pressure relief valves usually have an adjustable set pressure feature. This allows the valve's set point to be customized according to the specific requirements of the hydraulic system. By adjusting the set pressure, the valve can be calibrated to open at a specific pressure level.
- Overpressure Protection: When the pressure in the hydraulic system exceeds the set point, the relief valve opens to redirect the excess fluid flow back to the reservoir or another low-pressure circuit. This action prevents damage to system components and ensures that the pressure stays within safe limits.
- Flow Capacity: High-pressure regulating relief valves are designed to handle high flow rates and accommodate the fluid volume required by the hydraulic system. The flow capacity of the valve is an important consideration to ensure it can handle the maximum expected flow rate without causing excessive pressure drop or flow restriction.
- Pressure Stability: These valves are engineered to provide stable pressure regulation over a range of operating conditions. They should be able to maintain the set pressure within a narrow tolerance, even in the presence of fluctuations in flow rate, temperature, or other external factors.
- Reliability and Durability: High-pressure relief valves need to be reliable and durable to withstand the demanding conditions of hydraulic applications. They are typically constructed using high-quality materials that can withstand high pressures, resist corrosion, and provide a long service life.
- Performance Monitoring: Some advanced high-pressure relief valves may include features for performance monitoring. This can involve pressure sensing mechanisms or indicators that provide real-time feedback on the valve's operation, allowing for proactive maintenance or troubleshooting.
- Compliance with Standards: Depending on the industry and application, high-pressure regulating hydraulic relief valves may need to meet specific standards and certifications. Examples include ISO, ANSI, or other relevant industry standards. Compliance with these standards ensures the valve's performance, safety, and compatibility with other system components.
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