Working Pressure: 5.0 MPa
Voltage: DC24V±3V
Working Temperature: 0-50℃
Model: HY-SV-25-EX-TB
Technical Parameters:
Valve Body Material: 304 Stainless Steel
Connection Method: Inlet: M14*1.5 external thread, 37° internal taper; Outlet: 37° ball joint
Working Pressure: 5.0 MPa
Voltage: DC24V±3V
Working Temperature: 0-50℃
Working Medium: Gas
Control Method: Reversing Type
Explosion-proof Rating: EXdbIICT4Gb
Two Position Five Way Explosion Proof Solenoid Valve for Aerospace Experimental Systems
When I design or select a solenoid valve for an aerospace experimental system, I do not look at the valve as an isolated product. I look at the whole fluid circuit first.
What fluid is being controlled? What pressure does the system need? How fast must the valve switch? What happens when power is removed? How much space is available? Is the valve installed in a controlled laboratory, on a test platform, or in an environment where an explosive atmosphere may be present?
These questions become even more important when the project calls for a two position five way explosion proof solenoid valve for aerospace experimental systems.
A five way valve is commonly used when one actuator or pneumatic circuit needs several controlled flow paths. The two position design gives the system two defined switching states. In simple terms, the valve works like an electrically controlled traffic controller for compressed gas: an electrical command changes the internal passage, and the gas is directed to the required port.
At Xi'an Huiyuan Instrument Valve Co., Ltd., we have been involved in fluid control for decades. Our product range includes fluid solenoid valves, electrically controlled valves, pneumatically controlled valves, Pressure Reducing Valves and special non-standard valves. We also develop customized products for aerospace, commercial aerospace, nuclear power, shipbuilding, military applications and research institutes.
For us, the important part is not simply manufacturing a valve that opens and closes. We need to make sure that the valve matches the actual system around it.
On this page, I will explain how this type of valve works, why a two position five way configuration is useful, what I consider when developing an aerospace version, how explosion protection should be understood, how we manufacture and test the product, and what information you should prepare when asking us for a quotation.
Let us start with the name because it tells us quite a lot.
Two position means the valve has two defined operating states. When the solenoid is actuated, the internal valve mechanism moves from one state to the other. When the control condition changes, the valve can return to its original state according to its specific design.
Five way means the valve has five fluid ports or flow connections. A common pneumatic arrangement has one supply port, two working ports and two exhaust ports. The exact port arrangement depends on the valve design.
This configuration is especially useful for controlling a double acting pneumatic actuator. One valve can switch the pressure supply between the two sides of the actuator while providing a path for the opposite side to exhaust.
In plain English, I like to describe it this way: the valve decides which side of the actuator gets pressure and which side gets a way to release pressure.
Source: General pneumatic directional control principles. The actual port logic must be confirmed from the specific valve drawing and customer circuit.
The advantage of this arrangement is simple: it can provide directional control without requiring several separate valves to perform the same basic task.
For aerospace experimental equipment, this can help keep the fluid circuit organized and make automated testing easier.
A solenoid allows the valve to respond to an electrical control signal. That makes it convenient for systems where a PLC, test controller, computer interface or other electronic control unit needs to operate a pneumatic circuit.
In an experimental system, this can be particularly useful because the valve can be integrated into a larger automatic test sequence.
For example, the controller may command the valve to change state, wait for a sensor response, record the result and then switch the valve again. The valve becomes one small but important part of the test sequence.
Aerospace test equipment is different from ordinary factory automation.
A factory pneumatic system may mainly care about pressure, flow and cycle life. An aerospace experimental system may also have tight space limits, special fluids, temperature changes, vibration, electrical requirements, demanding cleanliness requirements and detailed test procedures.
That is why I prefer to discuss the application before discussing the model number.
One common application is an aerospace test bench. The equipment may be used to test valves, actuators, fluid-control assemblies or other aerospace components.
A two position five way solenoid valve can be used to control pneumatic actuators, switching mechanisms or other controlled gas paths within the test equipment.
Research institutes may build experimental systems that simulate certain operating conditions before a component reaches the final aerospace product.
In this kind of equipment, a reliable directional valve can help repeat the same test sequence again and again.
A five way configuration is well suited to many double acting pneumatic actuators. The valve can direct compressed gas to one side while allowing the other side to exhaust.
This makes the valve useful in automated fixtures, test stands and experimental mechanisms.
Aerospace laboratories often build systems that do not exactly match standard industrial equipment. A customer may need a special port arrangement, unusual mounting size, different coil voltage or specific materials.
This is where our experience with non-standard valves becomes useful.
We can start with a technical drawing, system schematic, sample or written specification and discuss the practical design.
Some experimental systems may operate in an environment where flammable gas, vapor or mist can create an explosion hazard. In such cases, electrical equipment requires an appropriate protection concept.
IEC 60079-0 specifies general requirements for Ex equipment and Ex components intended for explosive atmospheres. The current 2026 edition also explains that additional requirements may apply depending on the type of protection and operating conditions.
This is why I do not treat the words explosion proof as a simple marketing label. The required protection type, hazardous-area classification, gas group, temperature class, installation method and certification route all need to be confirmed for the actual project.
This is probably the part of the product name that needs the most careful explanation.
When a customer asks for an explosion proof solenoid valve for aerospace experimental systems, I first ask what they mean by explosion proof.
Different projects may use different protection concepts and different regulatory systems. The correct design cannot be selected from the words “explosion proof” alone.
In a hazardous area, the basic concern is that electrical equipment should not become an ignition source for an explosive atmosphere.
Depending on the selected protection method, the design may control ignition risk through enclosure construction, limitation of electrical energy, prevention of hot surfaces or other technical methods.
IEC 60079-1, for example, specifies requirements for equipment using the flameproof enclosure “d” type of protection in explosive gas atmospheres.
But a valve should not be called IEC 60079-1 certified simply because it has a metal enclosure. Certification depends on the complete product design, testing, marking and applicable certification process.
Aerospace research equipment can combine pneumatic systems, electrical controls, high pressure gases and unusual test media. In some projects, these conditions may create special safety concerns.
At the same time, an aerospace test system may not automatically be a hazardous-area system. The project environment determines whether explosion protection is actually required.
Therefore, before we finalize an explosion proof solenoid valve, I want to know:
What hazardous material is present?
Is the atmosphere gas, vapor, mist or dust?
What hazardous-area classification applies?
Which protection concept is required?
What certification standard is specified?
What temperature range is expected?
What electrical supply is available?
Where will the valve be installed?
Is the valve installed on the aircraft or only in ground test equipment?
What environmental tests are required?
Project Factor
Source: IEC 60079 series requirements and project engineering practice. The final classification and certification route must be determined by the application owner and applicable authority.
When we develop a two position five way solenoid valve for aerospace experimental systems, I focus on a few practical points.
The valve provides two defined flow states. This makes it suitable for directional control where the system needs to switch between two operating conditions.
The five way arrangement provides separate paths for supply, working connections and exhaust. This is particularly useful for double acting pneumatic actuators.
The solenoid converts an electrical command into mechanical movement. The coil voltage and electrical interface can be discussed according to the customer's control system.
In an automated experimental system, repeatability matters. The valve should behave in a consistent way each time the specified control signal is applied.
I do not promise one universal switching time for every model because response time depends on pressure, voltage, coil design, temperature, fluid and valve structure.
Sealing is one of the first things I check during valve development. A small leak can become a large problem when a test system is trying to maintain a stable pressure.
Experimental equipment often has many components packed into a small space. A compact valve can make installation easier.
Depending on the project, we can discuss different fluid connections, mounting arrangements and electrical interfaces.
If a standard five way valve does not fit your equipment, we can evaluate a non-standard design.
This may include changes to the body dimensions, port position, coil arrangement, mounting holes, materials or other mechanical details.
Parameter
Source: Huiyuan engineering practice. Numerical values should be taken from the final product drawing and technical specification rather than assumed from this general product description.
There is another point I want to make very clearly.
A valve used in an aerospace laboratory is not necessarily the same as a valve installed directly on an aircraft.
The difference can be significant.
Ground experimental equipment may operate inside a controlled laboratory or test facility. An airborne component can face vibration, temperature changes, altitude effects, humidity, electrical transients and electromagnetic conditions.
RTCA DO-160 provides standardized environmental test procedures for airborne equipment. RTCA describes DO-160 as a means of determining equipment performance under environmental conditions representative of those encountered when equipment is installed and operated on aircraft.
The FAA's AC 21-16G identifies DO-160 versions D through G as acceptable environmental qualification material for certain airworthiness compliance purposes and strongly encourages the use of DO-160G for new articles.
So, when a customer tells me, “This is for aerospace,” I still need more information.
If the valve is only used in a ground test bench, the qualification path may be very different from a valve installed on an aircraft.
We need to understand temperature, vibration, humidity, altitude, electrical conditions and other environmental factors that may apply.
Different aircraft programs can have different requirements. The applicable category and severity need to come from the equipment or aircraft specification.
I therefore do not write “DO-160 certified” on every aerospace product simply because DO-160 is a recognized aviation standard. That would be misleading.
Instead, we review the requested environmental test conditions with the customer and determine what needs to be designed, tested and documented.
A valve can be small, but the manufacturing process behind it is not necessarily simple.
For a special aerospace or experimental-system valve, we normally begin with technical information rather than immediately putting a standard product into production.
We review the customer's drawing, system diagram or specification.
We identify the fluid, pressure, flow, temperature, electrical input, valve state, connection method and environmental conditions.
We then determine the internal flow paths and moving mechanism.
For a two position five way valve, the main question is how the five ports should connect in each of the two operating states.
Materials are selected based on the working medium and environmental conditions.
Body material, internal moving parts, springs and sealing elements all need to work together.
Valve components are machined according to the required drawings and tolerances.
Small dimensional errors in internal components can affect movement and sealing, so machining quality matters even when the outside of the valve looks simple.
Components are cleaned according to the product process before assembly.
This is especially important for controlled fluid circuits where contamination can affect downstream equipment.
The coil and moving magnetic components are assembled with the valve body according to the defined structure.
We check whether the valve switches correctly under the specified operating conditions.
Applicable pressure and leakage tests are performed according to the product specification.
Electrical characteristics are checked against the required specification.
Before delivery, we inspect appearance and agreed acceptance criteria. The valve is then protected against moisture and impact during transportation.
Depending on the size and weight, we can use cartons, wooden cases or pallets.
Stage
Source: Huiyuan manufacturing and quality-control practice. Actual production and inspection steps vary according to product structure and customer requirements.
If you are buying a standard Industrial Solenoid Valve, comparing price and delivery time may be enough.
For a special aerospace experimental valve, I think the situation is different.
You need a manufacturer that can discuss the technical details with you and understand that the valve is part of a larger system.
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 early 1994.
We have continued to work in fluid-control technology, product development, manufacturing and technical services.
Special non-standard valves are an important part of our business.
We have provided specialized fluid-control products for aerospace, commercial aerospace, nuclear power, shipbuilding, military applications and research institutes.
This experience is useful when a customer needs something that does not fit an ordinary catalog.
We prefer to understand the application before making a final product recommendation.
If you have a drawing, schematic, sample valve or technical specification, our engineers can review the information and discuss whether an existing product can be adapted or a new non-standard structure is required.
Huiyuan has passed ISO 9001:2015 and has been recognized as a high-tech enterprise and a contract-abiding and creditworthy organization.
Our quality policy emphasizes establishing and continually improving the quality management system, developing high-quality products and providing efficient technical service.
We focus on high-end fluid-control applications where reliability, precise control and customization matter.
Our products include solenoid valves, electric control valves, pneumatic control valves, pressure reducing valves and special non-standard fluid-control products.
Depending on the project, we can support technical review, product development, customized manufacturing, inspection and delivery.
Production time depends on the model, material, quantity and customization level. Standard products can normally be arranged faster, while special aerospace experimental valves require additional engineering review.
Two position means the valve has two defined operating states. Five way means the valve has five fluid ports or flow connections. A common arrangement is one supply port, two working ports and two exhaust ports.
It is commonly suitable for directional control of pneumatic circuits, especially where a double acting actuator needs two controlled operating directions.
Yes, it can be developed for aerospace experimental equipment when the operating conditions and technical requirements are suitable. The exact design should be determined by the test system specification.
It means the product is intended to address ignition risks associated with a hazardous atmosphere through an appropriate protection concept. The exact protection method and certification requirements must be confirmed for the project.
No. Aerospace use by itself does not mean that an explosion-protected valve is required. The need depends on the actual environment, materials, gases, hazardous-area classification and applicable safety requirements.
We can discuss the required protection concept and evaluate the product structure according to the applicable specification. If IEC 60079-1 flameproof enclosure “d” protection is required, the complete design and qualification process must follow the applicable requirements. IEC states that 60079-1 contains specific construction and testing requirements for this protection method.
Yes, pneumatic applications using compressed air are one possible application. The actual pressure, temperature, flow and air quality requirements must be confirmed before selection.
It can potentially be designed for nitrogen service, but the final material, sealing and pressure requirements should be checked against the actual nitrogen system.
Customized fluid connections can be discussed according to the required flow, pressure and installation dimensions.
Yes. Non-standard mounting requirements are common in special equipment projects, and we can review the customer's drawing or installation space.
The coil can be developed according to the electrical requirements of the project, subject to the final design and applicable protection requirements.
That depends on the aircraft program and qualification requirements. A valve intended only for ground experimental equipment should not automatically be treated as an airborne certified component.
DO-160 qualification is project specific. RTCA DO-160 provides environmental test procedures for airborne equipment, while the FAA recognizes DO-160 as an acceptable environmental qualification basis for certain airworthiness compliance purposes.
We recommend confirming the exact DO-160 sections, categories and test levels required by the aircraft or equipment specification before development.
Please provide the working medium, pressure range, flow requirement, temperature range, control voltage, valve function, port size, mounting dimensions, required protection type, environmental conditions and quantity.
If available, a technical drawing, fluid schematic or existing sample will make the discussion much easier.
It depends on whether the product is standard or customized. Standard products can normally be arranged faster. Non-standard aerospace valves require technical review, material preparation, machining, assembly and testing, so the lead time is determined after the technical requirements are confirmed.
We normally use moisture-resistant and impact-resistant protection. Depending on the valve dimensions and weight, cartons, wooden cases or pallets may be used.
If you are looking for a two position five way explosion proof solenoid valve for aerospace experimental systems, you do not need to prepare a perfect technical package before contacting us.
Send us whatever information you already have. A drawing, old valve, system diagram or basic specification is enough to begin a technical conversation.
The following information is especially useful:
Application and equipment type
Ground experimental system or airborne system
Working medium
Normal and maximum pressure
Required flow rate
Operating temperature
Control voltage
Normally energized or normally de-energized state
Port configuration
Mounting dimensions
Expected switching frequency
Expected service life or cycle count
Environmental conditions
Hazardous-area classification, if applicable
Required explosion protection concept
Required certification or test standard
Quantity
Target delivery schedule
With this information, we can determine whether a standard product is suitable or whether a customized aerospace explosion proof solenoid valve should be developed.
I believe the best solenoid valve is not necessarily the one with the longest specification sheet. It is the one that fits the real system.
For a two position five way valve, that means getting the flow paths right. For an aerospace experimental system, it means understanding the environment. For an explosion-protected application, it means understanding the hazard and applying the correct protection concept.
These three things need to work together.
At Xi'an Huiyuan Instrument Valve Co., Ltd., we have decades of experience in fluid control and a long history of developing special non-standard valves. We work with aerospace, commercial aerospace, nuclear power, shipbuilding, industrial equipment and research institutes.
Our goal is straightforward: understand the customer's fluid-control problem, develop a practical valve structure, manufacture it carefully and verify the required performance before delivery.
If your project requires a two position five way explosion proof solenoid valve for aerospace experimental systems, send us your technical requirements. We can review the application and discuss the appropriate valve structure, materials, electrical configuration, protection concept and testing requirements.
Xi'an Huiyuan Instrument Valve Co., Ltd. — Specialized fluid control for aerospace, experimental systems and demanding industrial applications.
IEC 60079-0:2026 — Explosive atmospheres, Part 0, Equipment: General requirements. IEC states that this standard specifies general requirements for the construction, testing and marking of Ex equipment and Ex components intended for explosive atmospheres.
IEC 60079-1 — Explosive atmospheres, Part 1, Equipment protection by flameproof enclosures “d”. The standard specifies construction and testing requirements for equipment using flameproof enclosure protection.
FAA AC 21-16G — RTCA DO-160 versions D, E, F and G, Environmental Conditions and Test Procedures for Airborne Equipment. The FAA identifies DO-160 as acceptable environmental qualification material for certain airworthiness compliance purposes and strongly encourages DO-160G for new articles.
RTCA DO-160 environmental testing information. RTCA describes DO-160 as providing standardized procedures for determining airborne equipment performance under representative environmental conditions.
Technical note: The term “explosion proof” on this page describes the requested product application and design direction. It should not be interpreted as a claim that every configuration of this product has a particular hazardous-area certification. The applicable protection type, hazardous-area classification, certification, environmental qualification and test requirements must be confirmed for the specific project before production and installation.
Position 1 | Supply connected to one working port | Pressurized | Exhausted | Actuator moves in one direction |
Position 2 | Supply connected to the other working port | Exhausted | Pressurized | Actuator moves in the opposite direction |
Hazardous atmosphere | Gas, vapor, mist or dust? | Determines applicable protection requirements | ||
Area classification | Which hazardous zone or division applies? | Determines equipment suitability | ||
Protection type | Which Ex protection method is required? | Changes the valve and electrical design | ||
Gas group | Which gas or vapor group is involved? | May affect enclosure and protection requirements | ||
Temperature | What are minimum and maximum temperatures? | Affects coil, seals and protection requirements | ||
Certification | Which authority or standard is required? | Defines testing and documentation expectations | ||
Valve function | Two position five way | Determines internal flow paths | ||
Working medium | Specified gas or fluid | Determines material and seal compatibility | ||
Operating pressure | Customer specified | Influences body, sealing and actuator design | ||
Flow rate | Customer specified | Determines passage dimensions | ||
Control voltage | Customer specified | Determines coil configuration | ||
Temperature | Customer specified | Affects seals, coil and materials | ||
Installation | Aircraft or ground test equipment | Changes environmental and qualification requirements | ||
Protection requirement | Project specific | Determines applicable Ex design and certification route | ||
Requirement review | Confirm operating conditions | Correct product definition | ||
Design | Develop internal flow and actuation structure | Function and reliability | ||
Material selection | Select body and seal materials | Compatibility | ||
Machining | Manufacture valve components | Dimensional accuracy | ||
Cleaning | Prepare components | Clean fluid path | ||
Assembly | Assemble valve and solenoid | Correct mechanical operation | ||
Functional test | Verify switching behavior | Repeatable operation | ||
Pressure test | Verify pressure and sealing | Leakage control | ||
Final inspection | Inspect finished product | Conformance to specification |
यह वेबसाइट यह सुनिश्चित करने के लिए कुकीज़ का उपयोग करती है कि आपको हमारी वेबसाइट पर सर्वोत्तम अनुभव मिले।
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