Hydraulic Check Relief Valve
Dual‑Function Protection: Check & Relief in One Valve – Hydraulic Check Relief Valve Sv08‑23 Hydraulic systems in construction machinery, industrial equipment, and mobile hydraulics require both non‑return (check) and pressure relief (safety) functions. Combining both in a single valve saves space and improves reliability. The hydraulic check relief valve from Flying Bull (Model Sv08‑23) is a two‑position, two‑way threaded cartridge valve that provides both check and relief functions. It operates with oil as the medium. The valve 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 valve does This product is a two‑position, two‑way threaded plug‑in hydraulic check relief valve, categorized under solenoid valves. 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 key control component in hydraulic systems, meeting wholesalers’ procurement needs for hydraulic system safety control accessories. Operating pressure The valve is rated for standard pressure, making it compatible with the normal pressure conditions found in most hydraulic systems. It can be installed and used directly without requiring additional pressure adaptations, offering broad applicability and lowering the threshold for customer use. Common faults and maintenance methods (A) Common faults 1. Significant leakage – May be caused by: Poor sealing between the cone valve (or steel ball) and valve seat. Excessive clearance between the spool and valve body. Loose pipe connections or seal failure. Poor sealing on joint surfaces. 2. Sluggish or stuck operation – Dirt and debris buildup inside the valve can prevent the spool from moving normally. 3. Improper opening/closing – Aging or damaged spool seals may lead to hydraulic oil leakage. (B) Maintenance methods Vibration and noise control: Replace the valve or pilot valve if necessary. Extend the unloading time. Improve the geometric accuracy of valve components. Increase the diameter of the return oil pipe. Select softer main valve springs. Use higher‑viscosity hydraulic oil. Seal and venting inspection: Verify seal integrity and exhaust function. Install a dedicated return oil line if applicable. Component matching: Ensure the valve flow matches system requirements. Check the fit between the spool and valve bore. Replace deformed pressure‑regulating springs. Tighten pressure adjustment nuts. Repair worn cone valves. Eliminate resonance conditions. Symptoms of a failing check relief valve Pressure loss – System cannot build or maintain pressure. Load drift – Cylinder or actuator moves when it should remain stationary. Noisy operation – Chattering, squealing, or vibration from the valve. Overheating – Hydraulic oil temperature rises due to internal leakage. Slow actuator response – Cylinders move slower than normal. Durability and service life The product is backed by a one‑year warranty and manufactured to high‑quality standards, supported by over 15 years of brand production experience. Adhering to standardized maintenance practices – such as timely fault resolution and using appropriate hydraulic oil – can extend its reliable operating life and reduce after‑sales replacement costs for wholesalers. Why choose Flying Bull for the hydraulic check relief valve Sv08‑23? Dual function – Check and relief in one valve. Two‑position, two‑way – Versatile flow control. 100% brand new – Not rebuilt or refurbished. 1‑year warranty – Against manufacturing defects. Fast delivery – 5‑7 working days from Zhejiang, China. Customization available – Adapt to specific equipment. Flying Bull’s hydraulic check relief valve (Sv08‑23) is a reliable, high‑quality component for hydraulic systems requiring both non‑return and pressure protection. Choose Flying Bull for versatile, durable flow control.
Product Introduction
Products Description
I. Type & Basic Specifications
This product is a two-position, two-way threaded plug-in hydraulic one-way relief valve, categorized under solenoid valves. 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 key control component in hydraulic systems, meeting wholesalers' procurement needs for hydraulic system safety control accessories.
II. Operating Pressure
The valve is rated for standard pressure, making it compatible with the normal pressure conditions found in most hydraulic systems. It can be installed and used directly without requiring additional pressure adaptations, offering broad applicability and lowering the threshold for customer use.
III. Common Faults & Maintenance Methods
(A) Common Faults
Significant Leakage: May be caused by poor sealing between the cone valve/ball and valve seat, excessive clearance between the spool and valve body, loose pipe connections, seal failure, or poor sealing of joint surfaces.
Sluggish or Stuck Operation: Dirt and debris buildup inside the valve can prevent the spool from moving normally.
Improper Opening/Closing: Aging or damaged spool seals may lead to hydraulic oil leakage.
(B) Maintenance Methods
Vibration and Noise Control: Replace the valve or pilot valve if necessary; extend the unloading time, improve the geometric accuracy of valve components, increase the diameter of the return oil pipe, select softer main valve springs, or use higher-viscosity hydraulic oil.
Seal and Venting Inspection: Verify seal integrity and exhaust function; install a dedicated return oil line if applicable.
Component Matching: Ensure the valve flow matches system requirements; check the fit between the spool and valve bore, replace deformed pressure-regulating springs, tighten pressure adjustment nuts, repair worn cone valves, and eliminate resonance conditions.
IV. Durability & Service Life
The product is backed by a one-year warranty and manufactured to high-quality standards, supported by over 15 years of brand production experience. Adhering to standardized maintenance practices-such as timely fault resolution and using appropriate hydraulic oil-can extend its reliable operating life and reduce after-sales replacement costs for wholesaler
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OE NO.: Sv08-23
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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:Solenoid |
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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 type and applicable medium of the FLYING BULL hydraulic check relief valve (Model: Sv08‑23)?
This product is a 2‑position 2‑way threaded cartridge hydraulic check relief valve classified as a solenoid component. It is 100% brand‑new, with FLYING BULL as the brand, and is designed to work with oil as the medium. It is a key control part for hydraulic systems, suitable for your bulk supply to hydraulic system maintenance providers or equipment manufacturers.
2. What working pressure condition is this valve suitable for, and does it need extra pressure adjustment?
It is engineered for ordinary pressure working conditions, which matches the conventional pressure requirements of most hydraulic systems. No additional pressure adaptation or modification is needed – it can be directly installed and used, reducing the application threshold for your customers.
3. What are the common faults of this hydraulic check relief valve, and what may cause them?
Common faults and their causes include:
Severe leakage – May result from poor fit between the cone valve/steel ball and valve seat, excessive clearance between the slide valve and valve body, loose pipe joints, seal failure, or poor sealing on the joint surface.
Insensitive opening/closing or jamming – May be caused by dirt or foreign matter accumulating inside the valve, preventing the spool from moving normally.
Incomplete opening/closing – May occur if the spool seal ring is aged or damaged, leading to hydraulic oil leakage.
4. How can this valve be maintained to resolve vibration and noise issues?
Maintenance methods for vibration and noise include:
Replacing the hydraulic check relief valve or pilot valve.
Extending unloading time, improving the valve's geometric accuracy, increasing the return oil pipe diameter, using a soft main valve spring, and selecting oil with appropriate viscosity.
Checking and venting the seal, increasing the return oil pipe diameter, and setting up a separate return oil pipe.
Choosing a valve that matches the flow rate.
Inspecting and repairing the fit between the slide valve and valve hole, replacing the deformed pressure‑regulating spring, tightening the pressure‑regulating nut, repairing the worn cone valve, and eliminating resonance.
5. What is the warranty period for this valve, and what does it cover?
The 100% brand‑new product comes with a 1‑year warranty. The warranty covers manufacturing defects affecting normal operation, such as leakage due to poor valve body craftsmanship or jamming caused by substandard internal components. If such issues occur within the warranty period, we provide replacement or technical support.
6. What is the standard delivery time for bulk orders, and is expedited delivery available?
The standard delivery cycle for bulk orders is 5‑7 working days. For urgent needs (e.g., emergency maintenance of customer's hydraulic systems), please contact our 24‑hour sales team. We will adjust production and logistics to provide customized expedited solutions.
7. As a wholesaler, can we get factory‑direct pricing, and is there flexibility in MOQ?
We offer factory‑outlet pricing exclusively for wholesalers to ensure your market competitiveness. Regarding the Minimum Order Quantity (MOQ), we provide flexible terms based on your long‑term cooperation plans (e.g., annual procurement volume for hydraulic parts) and immediate needs. Please consult our sales team for the most suitable MOQ.
8. Does FLYING BULL provide customization services for this valve, and what can be customized?
Yes, we offer custom service for this valve. Customization mainly focuses on adapting to specific equipment (e.g., Atlas, Wirtgen machinery) by adjusting parameters to match the unique requirements of your customers' hydraulic systems. Please share detailed needs with our team for a tailored plan.
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