Nominal Diameter: DN80
Nominal Pressure: 1.0MPa
Working Pressure: 0.6MPa
Model: HY-BV-DS-M-DS
Technical Parameters:
Nominal Diameter: DN80
Nominal Pressure: 1.0MPa
Working Pressure: 0.6MPa
Working Medium: Air, Seawater
Flow Range: 0～100%
Connection Type: Flange
Sealing Requirements: The Ball Valve and its connecting mechanism should be freely adjustable and free from air and water leakage.
Marking Requirements: Opening and closing markings are required.
Material: 316L
Feedback Requirements: When the valve is fully closed, the resistance between the two lines is zero; otherwise, it is infinite. The valve position feedback adopts a micro-switch type passive contact feedback with an external waterproof protection device.
Deep sea manual stainless steel flange ball valve
When a valve works deep below the sea, ordinary selection rules are not enough. Water pressure, corrosion, sealing, installation space, and long-term reliability all matter. At Xi'an Huiyuan Instrument Valve Co., Ltd., we design and manufacture fluid control valves for demanding industrial and special applications. Our Deep Sea Manual Stainless Steel Flange Ball Valve is developed for projects where a simple manual ball valve must work reliably in a harsh underwater environment.
We know that a valve is not just a piece of metal in a pipeline. It is a working part of the whole fluid system. If the valve does not close properly, is difficult to operate, or suffers from corrosion, the entire system can be affected. That is why we pay close attention to valve structure, sealing surfaces, material selection, machining accuracy, inspection, and the actual operating conditions of each project.
This page explains how our deep sea manual stainless steel flange ball valve works, what makes it different from a normal ball valve, where it can be used, how we manufacture and inspect it, and what information we need before recommending a specific configuration.
A ball valve uses a round ball with a passage through its center. When the ball turns so the passage lines up with the pipeline, fluid can pass through. When the ball turns 90 degrees and the passage moves away from the flow path, the valve closes. It is a simple idea, but making that idea work safely in deep-sea service requires much more attention to detail.
Our deep sea manual stainless steel flange ball valve combines four basic design ideas: a ball valve shut-off mechanism, manual operation, stainless steel construction where specified, and flanged pipe connections. The flange connection makes the valve suitable for systems where bolted pipe connections are preferred for installation, maintenance, or equipment integration.
The word manual is also important. This valve does not need an electric actuator, pneumatic actuator, or hydraulic actuator simply to perform its normal opening and closing operation. An operator uses the valve handle or operating mechanism to control the ball. For underwater equipment where electrical or pneumatic equipment may add complexity, a manual configuration can be a practical choice when the system design allows it.
Stainless steel is often selected for demanding fluid environments because material selection plays a major role in corrosion resistance. However, we do not treat “stainless steel” as a magic word. The correct material depends on seawater chemistry, depth, pressure, temperature, exposure time, installation method, and other project conditions. For this reason, we confirm the actual material grade and sealing materials with the customer before production.
Item
Source note: This is a practical engineering comparison rather than a universal standard table. Final selection should be based on the actual system design, operating environment, required control method, and applicable project standards.
The operating principle is straightforward. Inside the valve body is a spherical ball with a flow passage. When the operator turns the handle, the stem transfers the turning force to the ball. The ball rotates around its axis.
Valve open: the ball passage is aligned with the pipeline, allowing fluid to flow.
Valve closing: the operator turns the handle and rotates the ball away from the flow direction.
Valve closed: the solid side of the ball faces the flow path and the sealing elements prevent unwanted leakage.
This quarter-turn operating principle is one reason ball valves are popular for fast isolation. Instead of requiring many turns like some other valve designs, a ball valve can normally move between open and closed positions with a short operating movement.
But deep-sea operation adds another layer of engineering. As depth increases, the outside water pressure becomes higher. The valve body, stem area, seals, connection points, and other pressure-containing parts must therefore be considered as part of the complete pressure system.
We also pay attention to the difference between internal working pressure and external seawater pressure. Depending on how the valve is installed, these pressure conditions can act in different directions. That is why we do not recommend selecting a deep-sea valve only by looking at nominal pipe size. The actual pressure condition and installation depth must be confirmed first.
For any ball valve, sealing is one of the most important areas. A good sealing system helps prevent fluid from escaping when the valve is closed and helps reduce leakage around the stem.
In deep-sea applications, the sealing design must be considered together with pressure, temperature, fluid type, material compatibility, operating frequency, and expected service life. A seal that works well in a normal industrial pipeline may not automatically be the right choice for an underwater system.
That is why we confirm the sealing arrangement as part of the technical review instead of simply using one standard configuration for every customer.
A ball valve has a relatively compact flow-control structure. This is useful when equipment space is limited, which is common in subsea equipment, underwater test systems, marine machinery, and special research equipment.
The quarter-turn principle allows fast opening and closing compared with many multi-turn valve designs. When an operator needs to isolate a section of a pipeline, a manual ball valve can provide direct and simple control.
Stainless steel can be selected for demanding environments where corrosion resistance is important. We can review the required material according to the fluid, seawater exposure, pressure, temperature, and customer specification.
Flanged ends provide a bolted connection between the valve and the pipeline or equipment. This can be useful for installation and maintenance, especially where the valve needs to be removed from the system later.
The manual design avoids the need for an actuator and external control power. This can simplify some systems and reduce the number of components that need to be integrated into the equipment.
We understand that a deep-sea project is rarely a simple catalog purchase. Customers may have different flange standards, dimensions, materials, sealing requirements, operating methods, pressure conditions, and installation restrictions. Our engineering team can review these requirements before production.
Selection Factor
Source note: The table is our engineering selection guide. It is not a replacement for the applicable project standard or customer specification. For a specific valve, we confirm the actual design conditions before quoting.
The main advantage of our deep sea manual stainless steel flange ball valve is not one single feature. It is the way several details work together.
Seawater is a challenging environment for metal equipment. Long exposure can cause corrosion, surface damage, or loss of material if the wrong material is selected. We therefore treat material compatibility as an early-stage engineering question rather than something decided after the valve has already been designed.
Stainless steel is one possible material family for this type of service, but the exact grade should be selected according to the project. For especially demanding subsea applications, we can discuss the customer's required material standard and corrosion conditions before manufacturing.
Deep-sea valves are different from ordinary surface valves because the surrounding water itself can create substantial pressure. The deeper the equipment goes, the more important pressure-related design becomes.
We therefore ask customers for the working depth or pressure condition, internal medium pressure, temperature, valve size, and connection details. With this information, our technical team can determine whether a standard configuration is suitable or whether a customized design is required.
A ball valve is mainly used for isolation rather than precise throttling. Its strong point is simple and clear: open the passage when you need flow, close it when you need isolation.
For systems where leakage control is important, we pay particular attention to the valve seat, ball surface, stem sealing, body sealing, and assembly quality. Before delivery, we perform pressure and sealing checks according to the agreed technical requirements.
Our experience is not limited to standard industrial valves. Huiyuan has long worked on special non-standard valves and fluid-control equipment for aerospace, commercial aerospace, nuclear power, shipbuilding, military-related applications, and research institutes.
This experience is useful when a customer has an unusual requirement. Instead of simply asking you to choose from a fixed catalog, we can start from the actual working conditions and discuss the valve structure with your engineering team.
Valve testing depends on the product specification and applicable standard. In marine-related standards and rules, valve testing can include seat tightness, operation, flow or capacity verification, and pressure testing. For example, IMO Resolution MSC.370(93) includes specific testing requirements for certain piping components, including valve seat tightness, satisfactory operation, and pressure testing for the relevant applications.
This does not mean every deep-sea manual ball valve should automatically use the exact same test program. The correct test plan depends on the intended application, design pressure, temperature, material, applicable marine or project rules, and customer requirements.
We see this type of valve as a practical solution for fluid isolation in demanding environments. The exact application determines the final design, but common areas include the following.
Underwater equipment may need manual isolation valves for water circuits, hydraulic systems, test lines, or other fluid-control functions. In these systems, the valve must fit the available space and withstand the specified environmental conditions.
Marine equipment can use manual stainless steel ball valves in seawater-related and auxiliary fluid systems where the material and valve configuration are appropriate. The final selection should always consider the vessel or equipment specification and applicable classification or regulatory requirements.
Scientific research equipment often operates far from easy maintenance access. Researchers may need valves that are simple to understand, easy to isolate, and designed around a specific experimental system. Our non-standard valve experience is especially useful for this type of project.
Test benches and pressure-test equipment can require manual isolation at different points in a fluid circuit. A flanged ball valve can be integrated into these systems when the connection and pressure requirements match.
Offshore equipment faces saltwater, humidity, vibration, limited maintenance access, and other environmental challenges. A properly specified stainless steel manual ball valve can provide a simple isolation function where automation is not required.
Some aerospace and research test systems use special fluid-control components under unusual operating conditions. While not every aerospace system is a deep-sea application, the engineering approach is similar in one important way: the valve has to be designed around the real operating conditions rather than selected only by appearance or nominal size.
Source note: This table summarizes common engineering considerations. The suitability of a particular valve must be confirmed against the actual project specification and applicable standards.
At Huiyuan, we believe valve quality starts before machining. It starts with understanding what the customer actually needs. For a deep-sea valve, that means reviewing the fluid, pressure, depth, temperature, size, flange connection, material requirements, sealing requirements, operating method, and installation environment.
We first review the customer's drawings, specifications, operating conditions, and interface requirements. If some information is missing, we clarify it before production. This step sounds simple, but it can prevent many problems later.
Depending on the project, we select the valve body material, ball, stem, seat, sealing elements, fasteners, and other components according to the required service conditions. For a deep-sea stainless steel ball valve, corrosion and pressure conditions receive special attention.
The body, ball, stem, and connection surfaces must be machined to the required dimensions. The ball and sealing surfaces are especially important because their fit affects valve operation and shut-off performance.
Components are cleaned and assembled according to the approved technical requirements. During assembly, we pay attention to alignment, sealing components, operating torque, and the correct position of the ball.
Before shipment, our valve undergoes inspection according to the agreed requirements. This can include pressure testing, sealing inspection, opening and closing checks, appearance inspection, dimensional checks, and other tests required by the order.
Our quality approach is built around a controlled management system rather than relying on a final visual check alone. ISO describes ISO 9001 as a framework for establishing, maintaining, and continually improving a quality management system, with requirements covering areas such as operation, performance evaluation, and improvement.
Huiyuan has previously passed ISO 9001:2015 certification according to our company qualification information. Because ISO is currently publishing the next edition of the standard in 2026, customers with specific certification requirements should confirm the exact certificate and applicable edition with us during procurement.
After final inspection, the valve is prepared for shipment. Depending on the product size and weight, we can use cartons, wooden cases, or pallets with suitable moisture and shock protection. For long-distance or international transportation, packaging is planned to reduce the risk of damage during handling and transit.
Production time depends on the valve model, material, size, quantity, and customization level. Standard products can normally move faster, while non-standard deep-sea valves require technical confirmation before manufacturing. Payment can be arranged through advance payment, payment before shipment, or agreed contract terms. Transportation can be arranged through logistics, express delivery, or dedicated freight according to the project.
Choosing a valve supplier is not only about finding the lowest price. For special fluid-control equipment, the bigger question is whether the supplier understands the application and can turn the requirements into a workable product.
Xi'an Huiyuan Instrument Valve Co., Ltd. was formerly the Solenoid Valve Branch of Xi'an Instrument Factory and was restructured into a joint-stock company in 1994. We have decades of experience in fluid control and specialize in solenoid valves, electrically controlled valves, pneumatically controlled valves, Pressure Reducing Valves, and special non-standard valves.
Our work covers demanding industries including aerospace, commercial spaceflight, nuclear power, shipbuilding, military-related applications, and scientific research. This background has taught us an important lesson: special valves cannot be designed properly by looking at only one parameter.
A customer may come to us with an existing pipeline but a new installation depth. Another customer may need a different flange standard. Someone else may have a special sealing requirement or limited installation space. We are used to discussing these details and developing a technical solution around them.
Our business is centered on fluid-control equipment. This means our engineering experience is not limited to one type of valve. We can look at the valve as part of the wider system and discuss isolation, pressure control, flow direction, operating method, and interface requirements.
Huiyuan has been recognized as a High-Tech Enterprise and a Contract-Abiding and Creditworthy unit, and our electric control valves have received Advanced Quality Product and Xi'an Famous Brand Product recognition. We also have experience supplying specialized valves and fluid-control products for high-end equipment and research applications.
For a deep-sea project, we would rather spend more time confirming the technical details before production than discover a mismatch after the valve has been installed. That is simply better engineering and better business.
Valve nominal size
Required installation depth
Internal working pressure
External seawater pressure
Fluid type
Operating temperature
Stainless steel material grade or customer material standard
Flange standard and dimensions
Seat and sealing requirements
Manual operating method and available space
Required inspection and test standard
Packaging and transportation requirements
If you already have a drawing or technical specification, our engineers can review it and confirm whether a standard configuration or customized design is more appropriate.
The biggest difference is the operating environment. A deep-sea valve may experience high external water pressure, seawater corrosion, difficult maintenance access, and special installation conditions. Therefore, the body structure, sealing system, materials, connections, and test requirements may need to be designed specifically for the application.
Not necessarily. Stainless steel can provide useful corrosion resistance, but the correct material depends on the actual seawater condition, pressure, temperature, service life, and other project factors. We recommend confirming the exact material grade with our engineering team instead of choosing a material only because it is called “stainless steel.”
A manual ball valve can be a good choice when remote or automatic operation is not required. It does not need an electrical or pneumatic actuator for normal operation and can provide a simple isolation function. However, if the valve is difficult to access or must be operated frequently from a remote location, an actuated valve may be more suitable.
Yes, flange dimensions and standards are important parts of the technical review. We can discuss the required flange standard, nominal size, bolt pattern, face dimensions, and installation space before production. The exact configuration must be confirmed against the customer's drawing or specification.
It can be designed for seawater-related service when the selected materials, seals, pressure conditions, and other design details are suitable. We do not recommend using a standard valve in seawater simply because the body is stainless steel. Please provide the actual seawater conditions and installation depth so we can evaluate the configuration.
The most useful information includes valve size, fluid, pressure, temperature, installation depth, flange standard, material requirement, operating method, quantity, and applicable testing standard. A technical drawing is even better if available.
Yes. Special non-standard valves are an important part of our business. We have supplied customized fluid-control products for aerospace, commercial aerospace, nuclear power, shipbuilding, military-related applications, and research institutes.
The production cycle depends on the model, material, size, quantity, and customization requirements. Standard configurations can normally be handled more quickly. Customized deep-sea valves require technical review and confirmation before production, so the delivery time is confirmed with the customer after the technical solution is finalized.
According to the agreed technical requirements, inspection can include pressure testing, sealing testing, opening and closing operation, dimensional inspection, and appearance inspection. For projects governed by marine, classification, or other special requirements, the test plan can be aligned with the applicable specification.
Yes. In fact, this is often the best way to start a special valve project. Instead of asking you to guess a model number, we can work from the operating conditions and determine the appropriate structure, material, connection, and sealing arrangement together.
A Deep Sea Manual Stainless Steel Flange Ball Valve may look simple from the outside, but deep-sea service can make the engineering requirements much more demanding. Pressure, corrosion, sealing, flange connection, manual operation, installation space, and testing all need to work together.
At Xi'an Huiyuan Instrument Valve Co., Ltd., we bring decades of fluid-control experience to these special requirements. We manufacture standard and customized valves and have long supported demanding applications in aerospace, commercial aerospace, nuclear power, shipbuilding, and scientific research.
If your project requires a Deep sea stainless steel ball valve, manual subsea ball valve, flanged deep sea ball valve, or custom stainless steel ball valve for underwater equipment, send us your operating conditions. We can review the technical requirements and discuss a suitable valve configuration with you.
We do not believe one standard valve can solve every special application. Our approach is simple: understand the working conditions first, select the right design, manufacture carefully, test according to the agreed requirements, and deliver the valve safely.
Normal operation | Hand operated | Motor operated | Compressed-air operated |
External power required | No | Yes | Usually yes, through an air system |
Control complexity | Low | Medium to high | Medium to high |
Typical advantage | Simple and direct operation | Remote or automatic operation | Fast automated operation |
Best choice | When manual isolation is practical | When electrical automation is required | When pneumatic automation is available |
Installation depth | Influences external water pressure and system design | Working depth or pressure condition | |
Fluid | Affects material and sealing compatibility | Seawater, fresh water, gas, oil, test fluid, etc. | |
Valve size | Influences flow capacity and installation dimensions | Nominal size and connection dimensions | |
Pressure | Determines pressure-containing design requirements | Internal and external pressure conditions | |
Temperature | Influences body, seat, and seal performance | Minimum and maximum operating temperature | |
Connection | Ensures mechanical compatibility with the pipeline | Flange standard and dimensions | |
Operating method | Determines how the valve will be opened and closed | Manual force, access space, operating frequency | |
Deep-sea equipment | External pressure and access | Pressure design, sealing, compact structure | |
Marine systems | Corrosion and reliability | Material compatibility and sealing | |
Research equipment | Special operating conditions | Customized dimensions and connections | |
Underwater test systems | Repeatable isolation | Manual operation and pressure testing | |
Offshore equipment | Harsh environment | Corrosion resistance and mechanical strength |
यह वेबसाइट यह सुनिश्चित करने के लिए कुकीज़ का उपयोग करती है कि आपको हमारी वेबसाइट पर सर्वोत्तम अनुभव मिले।
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