12 Volt Solenoid Coil
Reliable 12V DC Solenoid Coil for Oil Pump Proportional Valves – 12 Volt Solenoid Coil R900021389 Hydraulic systems in construction machinery – oil pumps, proportional valves, and control circuits – depend on reliable solenoid coils for precise actuation. A faulty coil can cause valve sticking, slow response, or machine downtime. The 12 volt solenoid coil from Flying Bull (Model R900021389) is a solenoid valve coil designed to operate with oil as the medium. It serves as a compatible coil for proportional solenoid valves in oil pump systems. The coil is 100% brand new, manufactured in Zhejiang, China, and backed by a 1‑year warranty. Delivery takes 5–7 working days. Product overview – what this coil does This product is a solenoid valve coil, categorized under coil components. The brand is FLYING BULL, and all units are supplied as 100% new and genuine, sourced directly from the original factory. Designed to operate with oil as the medium, it serves as a compatible coil for proportional solenoid valves in oil pump systems. As a key component of construction machinery hydraulic control systems, it meets wholesalers’ procurement needs for standardized hydraulic valve coils. Electrical performance and voltage specifications The coil operates at a stable 12V DC, precisely matching the 12V power supply used in hydraulic control systems – such as oil pump proportional solenoid valves – in construction machinery. This ensures reliable coil activation in the circuit, reduces the risk of equipment failure due to voltage mismatch, and offers strong adaptability. Operating pressure The coil is rated for standard pressure, making it suitable for the normal pressure conditions in most construction machinery hydraulic systems. It can be directly applied in common hydraulic control environments without requiring additional pressure adjustments, lowering the threshold for customer use and providing wide compatibility. Durability and service life The product comes with a one‑year warranty and is manufactured to high‑quality standards, backed by over 15 years of brand production experience. Regular routine maintenance, such as periodic inspections and cleaning, can further extend its stable operating life. This helps minimize hydraulic system issues caused by coil failure and reduces after‑sales replacement costs and frequency for wholesaler customers. Maintenance guidelines – keeping your coil reliable 1. Daily inspection – Visually check the coil for any deformation, cracks, or corrosion. Ensure all connections are secure and solder joints intact. Conduct functional testing to verify there are no short circuits or open circuits. 2. Regular cleaning – Periodically remove dust, oil, and other contaminants from the coil surface. Clean the housing using a cleaning solution or water, but avoid using sharp objects that could scratch or damage the coil. Symptoms of a failing solenoid coil Valve does not shift – No click when the coil is energized. Slow or erratic valve response – Intermittent operation. Coil overheating – Housing is hot to the touch. Visible damage – Cracks, melting, or discoloration on the coil housing. Intermittent machine operation – The hydraulic function works sometimes, not others. Why choose Flying Bull for the 12 volt solenoid coil R900021389? Direct replacement – Matches R900021389 specifications. 12V DC – Common construction machinery voltage. Oil pump proportional valve compatible – Designed for oil pump systems. 100% brand new – Not rebuilt or refurbished. 1‑year warranty – Against manufacturing defects. Fast delivery – 5‑7 working days from Zhejiang, China. Flying Bull’s 12 volt solenoid coil (R900021389) is a reliable, high‑quality replacement for construction machinery hydraulic systems. Choose Flying Bull for durable solenoid coils.
Product Introduction
Products Description
I. Product Type & Basic Specifications
This product is a solenoid valve coil, categorized under coil components. The brand is FLYING BULL, and all units are supplied as 100% new and genuine, sourced directly from the original factory. Designed to operate with oil as the medium, it serves as a compatible coil for proportional solenoid valves in oil pump systems. As a key component of construction machinery hydraulic control systems, it meets wholesalers' procurement needs for standardized hydraulic valve coils.
II. Electrical Performance & Voltage Specifications
The coil operates at a stable 12V DC, precisely matching the 12V power supply used in hydraulic control systems-such as oil pump proportional solenoid valves-in construction machinery. This ensures reliable coil activation in the circuit, reduces the risk of equipment failure due to voltage mismatch, and offers strong adaptability.
III. Operating Pressure
The coil is rated for standard pressure, making it suitable for the normal pressure conditions in most construction machinery hydraulic systems. It can be directly applied in common hydraulic control environments without requiring additional pressure adjustments, lowering the threshold for customer use and providing wide compatibility.
IV. Durability & Service Life
The product comes with a one-year warranty and is manufactured to high-quality standards, backed by over 15 years of brand production experience. Regular routine maintenance, such as periodic inspections and cleaning, can further extend its stable operating life. This helps minimize hydraulic system issues caused by coil failure and reduces after-sales replacement costs and frequency for wholesaler customers.
V. Maintenance Guidelines
Daily Inspection: Visually check the coil for any deformation, cracks, or corrosion. Ensure all connections are secure and solder joints intact. Conduct functional testing to verify there are no short circuits or open circuits.
Regular Cleaning: Periodically remove dust, oil, and other contaminants from the coil surface. Clean the housing using a cleaning solution or water, but avoid using sharp objects that could scratch or damage the coil.
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OE NO.: R900021389
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Media: Oil |
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Warranty: 1 YEAR |
Condition:New, 100% Brand-new |
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Place of Origin:Zhejiang, China |
ltem:coil |
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Brand Name:FLYING BULL |
Quality:High-Quality |
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Delivery:5-7 Working Days |
Pressure:Ordinary Pressure |
Company Introduction
Frequently Asked Questions (FAQ)
1. What is the core application and matching medium of the FLYING BULL 12‑volt solenoid coil (Model: R900021389)?
This product is a solenoid valve coil classified as a "coil" component, with 100% brand‑new quality and FLYING BULL as the brand. It is specifically designed to work with oil as the medium and serves as a matching coil for oil pump proportional solenoid valves. It is a key part of construction machinery hydraulic control systems, making it ideal for your bulk supply to construction machinery maintenance providers or hydraulic equipment manufacturers.
2. What electrical specification does this solenoid coil follow, and how does it ensure compatibility with equipment?
The coil operates at a standard 12 volts, which precisely matches the 12V power supply systems of hydraulic control devices (such as oil pump proportional solenoid valves) commonly used in construction machinery. This stable voltage adaptation avoids equipment malfunctions caused by voltage mismatch, ensuring reliable triggering and operation of the hydraulic system.
3. What working pressure condition is the R900021389 solenoid coil suitable for, and does it require additional pressure adjustment?
It is engineered for ordinary pressure working conditions, which aligns with the conventional pressure requirements of most construction machinery hydraulic systems. No extra pressure adaptation or modification is needed – it can be directly installed and used in standard pressure hydraulic control scenarios, reducing the application threshold for your customers.
4. What maintenance measures are recommended to extend the service life of this solenoid coil?
Key maintenance steps include:
Daily inspection – Visually check for deformation, cracks, or corrosion. Ensure connections are secure and solder joints intact. Test for short/open circuits.
Regular cleaning – Remove dust, oil, and contaminants from the coil surface. Clean the housing with a suitable solution or water. Avoid using sharp objects that could scratch or damage the coil.
5. What is the warranty period for the R900021389 solenoid coil, and what does it cover?
The 100% brand‑new product comes with a 1‑year warranty. The warranty covers manufacturing defects that affect normal operation, such as coil failure due to substandard production or insulation issues. If such issues occur within the warranty period, we provide replacement or technical support in line with warranty terms.
6. What is the standard delivery time for bulk orders, and is expedited delivery available for urgent needs?
The standard delivery cycle for bulk orders is 5‑7 working days. For urgent requirements, please contact our 24‑hour sales team. We will adjust production and logistics schedules based on your order volume and urgency to provide customized expedited delivery solutions.
7. As a wholesaler, can we get factory‑direct pricing, and is there flexibility in Minimum Order Quantity (MOQ)?
We offer factory‑outlet pricing exclusively for wholesalers to ensure your market competitiveness. Regarding MOQ, we provide flexible terms based on your long‑term cooperation plans and immediate order demands. Please consult our sales team to confirm the most suitable MOQ for your business.
8. Does FLYING BULL provide customization services for this solenoid coil, and what customization options are available?
Yes, we offer custom service for this coil. Customization mainly focuses on adapting to specific construction machinery models (e.g., different oil pump systems) or adjusting parameters to match unique hydraulic control requirements. Please share detailed needs with our team for a tailored plan.
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