Product Features
1. Functions
1)Fluid Control: In the pump-valve system of submersible equipment, the opening and closing action of the umbrella valve (driven by the valve stem to move the disk) precisely controls the on-off and flow rate of fluids (such as seawater, gas). For example, in the air supply system of a diving respirator, it regulates the delivery rhythm and volume of compressed air, ensuring smooth breathing for divers and stable air supply. This control function is consistent with the core role of Sealed Fluid Direction Control Valves and One-Way Flow Valves in fluid circuit management.
2)Pressure Regulation and Sealing: Leveraging the large contact area of the disk, it adjusts the pressure within the pump-valve system. When the system pressure changes, the umbrella valve disk can automatically adjust its opening degree based on pressure differences, while achieving reliable sealing to prevent fluid leakage—ensuring the normal operation of submersible equipment in complex underwater pressure environments. For instance, in submersible sewage pumps, it blocks seawater backflow and maintains stable pump cavity pressure. This dual function complements the performance of Sealed Diaphragm Pumps and Check and Non-Return Valves in pressure-sensitive systems.
3)Impact Resistance and Protection: During the operation of submersible equipment, the umbrella valve can withstand impacts caused by water flow and pressure fluctuations, protecting precision components inside the pump-valve system from damage due to fluid impact and extending equipment service life. For example, in the hydraulic pump-valve of a submersible thruster, it buffers the pressure impact of hydraulic oil. This protective effect supports the durability of Micro Sealed Hydraulic Pumps and other critical underwater components.
2. Required Characteristics
1)High-Strength Sealing Performance: Since submersible equipment operates in underwater environments with complex pressure and fluid leakage risks, the umbrella valve must have extremely high sealing capabilities. It should effectively seal fluids under varying water depth pressures (from shallow to deep water, with significant pressure changes) to prevent leakage of seawater, gas, etc.—ensuring equipment functionality and diver safety. This is the most core performance requirement, meeting the strict leak-proof standards of Sealed Fluid Transfer Pumps and Reverse Prevention Valves.
2)Seawater Corrosion Resistance: In long-term contact with seawater (containing salt, minerals, and other corrosive components), the umbrella valve material must have excellent seawater corrosion resistance. It should not experience material degradation, cracking, or rusting (if metal parts are included) due to seawater immersion, ensuring stable operation in harsh underwater environments with a long service life (generally required to meet thousands of hours or more of underwater operation needs). This resistance complies with the material durability standards of Fluid Check Mechanisms and Directional Control Valves in marine environments.
3)High Pressure Resistance and Compression Deformation Resistance: In high-pressure environments corresponding to diving depths (e.g., extremely high pressure at hundreds of meters underwater), the umbrella valve’s structure must withstand high pressure without deformation or damage. The disk and valve stem must have sufficient strength to ensure normal pressure transmission and sealing functions, preventing valve ports from failing to close or sealing failure due to high pressure. This structural strength aligns with the pressure resistance requirements of Micro Sealed Hydraulic Pumps and Sealed Diaphragm Pumps.
4)Good Elasticity and Toughness: The umbrella valve’s disk needs appropriate elasticity to flexibly deform according to pressure changes during opening and closing, achieving precise flow control and sealing. At the same time, it must have toughness to resist breakage and damage during frequent pressure fluctuations and opening-closing actions, maintaining structural integrity and functional stability. This mechanical property is comparable to the elastic performance of sealing components in Mini Sealed Valves.
5)Low Friction and Wear Resistance: When the umbrella valve moves in the pump-valve system, friction between it and contact components (such as valve seats) must be low to reduce energy loss and improve equipment energy efficiency. It must also have wear resistance—long-term opening-closing friction should not cause excessive wear to the disk, which would affect sealing and control performance, ensuring long-term stable operation of the equipment. This wear resistance meets the service life standards of Check and Non-Return Valves in high-frequency use scenarios.
6)Dimensional and Geometric Accuracy: Its dimensions must be precisely adapted to the pump-valve system of submersible equipment, with strict geometric tolerances (such as the flatness of the disk, the perpendicularity of the valve stem). This ensures the umbrella valve fits perfectly with other components after installation, achieving stable fluid control and sealing, and avoiding equipment operation failures caused by dimensional deviations. This precision is consistent with the manufacturing standards of Sealed Fluid Direction Control Valves.
7)Fatigue Resistance: During the operation of submersible equipment, the umbrella valve may open and close frequently (e.g., the air supply valve of a diving respirator acts with the breathing rhythm). It must have good fatigue resistance—after a large number of opening-closing cycles (tens of thousands of times or more), it should still maintain good elasticity, sealing performance, and structural strength without performance degradation. This fatigue resistance supports the long-term reliability of Sealed Fluid Transfer Pumps and other cyclic operation systems.
