China Made Hydraulic V-Packing 40x50 Size PVP-040K Model Wear Resistant Vee Pack Seal For Hydraulic Cylinder Piston Rod Service

Our V-Seal V-Packing 40x50 is widely used in various industrial fields that require reliable hydraulic cylinder piston rod sealing, especially in high-pressure, dynamic motion, and harsh working environments. Key application scenarios include:

• Construction Machinery: Hydraulic cylinders of excavators, cranes (telescopic truck cranes), loaders, bulldozers, and other construction equipment, where the seal must withstand high pressure, frequent reciprocating motion, and dust contamination.
• Industrial Machinery: Hydraulic systems of machine tools, presses, injection molding machines, and conveyor equipment, ensuring leak-free operation and stable system pressure to improve production efficiency.
• Mining Machinery: Hydraulic cylinders of mining trucks, crushers, and drilling equipment, adapting to high-pressure, high-wear, and dusty working conditions, reducing maintenance frequency and downtime.
• Agricultural Machinery: Hydraulic systems of tractors, harvesters, and agricultural equipment, withstanding temperature changes and outdoor harsh environments, ensuring reliable operation during farming seasons.
• Other Hydraulic Equipment: Hydraulic pumps, valves, and other hydraulic components that require V-seal packing, compatible with both single-acting and double-acting cylinders, providing versatile sealing solutions.

Applicable to: PVP series V-Packing oil seals, V-type combination seals for hydraulic cylinder piston rods/plungers, material: cloth-reinforced rubber, wear-resistant and high-pressure resistant

1. Tools and Accessories

Complete V-Packing combination seal set (V-Packing main seal, support ring, retaining ring, pressure ring), 400# fine sandpaper, waterless cleaning oil, lint-free cloth, plastic installation sleeve, rubber hammer, grease (high-pressure resistant grease for hydraulic systems), calipers, gloves

2. Workpiece Inspection

Piston rod/plunger surface: No burrs, scratches, rust, or dents. Minor scratches should be polished smooth with fine sandpaper.

Sealing groove: Clean away iron filings, old seal ring residue, and oil stains. Chamfer the groove edges to remove sharp edges (sharp edges will cut the cloth-reinforced seal).

Model Verification: Confirm specifications 40*50, model PVP-040K, complete V-Packing combination seal set. The fabric-reinforced parts are complete, with no cracks, fabric peeling, or hardened damage.

The piston rod and sealing grooves are thoroughly rinsed with cleaning oil and wiped dry with a cloth, ensuring no metal shavings remain.

High-pressure grease is evenly applied to the inner and outer surfaces of the entire V-shaped fabric-reinforced seal, ensuring the inner side of the V-shaped opening is fully saturated.

A thin layer of grease is applied to the inner wall of the groove to facilitate pressing and prevent dry friction from tearing the fabric layer.

The V-shaped seal opening faces the hydraulic medium side (inside the cylinder/towards the hydraulic oil).

The entire assembly sequence from the inside out (from the piston rod towards the cylinder groove):

• Hard plastic/PTFE retaining ring (anti-extrusion ring)
• First V-shaped fabric-reinforced oil seal (V-shaped opening facing hydraulic oil)
• Intermediate support spacer ring
• Second V-shaped fabric-reinforced oil seal (V-shaped openings facing the same direction, both towards the hydraulic pressure)
• Pressure ring (back support ring, conforming to the groove step)

Important: The V-shaped opening of all V-shaped fabric-reinforced seals... The V-shaped opening must face the side with pressurized oil; reverse installation will result in direct oil leakage and rapid wear.

Gently insert the assembled seal onto the piston rod and slowly push it into the sealing groove.

Use a plastic installation sleeve of the same size to cover the sealing end face. Do not directly strike the fabric-reinforced oil seal with a hammer (the fabric is prone to cracking and delamination).

Evenly tap the sleeve with a rubber mallet to press the entire seal flat into the groove, without tilting, twisting, or flipping.

After press-in, manually rotate the piston rod to check for jamming, seal lifting, and localized compression deformation.

Slowly push the piston rod into the cylinder, maintaining concentricity throughout. Do not tilt or scrape the V-shaped fabric-reinforced lip.

Tighten the end cap bolts evenly and diagonally to ensure consistent force and prevent seal failure due to one-sided compression.

No-load pressure test: Introduce hydraulic oil at low pressure and observe for any oil leakage or dripping at the seal.

Gradually increase the working pressure to the rated pressure, let it stand for 10 minutes, and re-inspect. No leakage indicates successful installation.

• Do not pry or press the V-shaped fabric with screwdrivers or metal tools. Damage to the fabric fiber layer will cause rapid leakage.
• Do not install directly if the groove has no chamfer or burrs. Sharp edges will cut the fabric rubber.
• V-shaped seals cannot be mixed or installed in reverse.
• Forced assembly without lubrication when the seal is dry will easily tear the lip.
• Multiple V-shaped fabric seals must be installed in the same direction; the V-mouths cannot be opposite each other.
• Avoid exposure to direct sunlight and oil corrosion during storage. Hardened or delaminated fabric should be discarded and replaced.

• Minor Oil Leakage: Seal installed backwards, V-mouth facing incorrectly.
• Local Oil Drips: Burrs in the groove, tilted installation, damaged fabric lip.
• High-Pressure, Large Oil Leakage: Missing retaining ring to prevent extrusion, missing support ring.
• Short-Term Rapid Wear: No lubricant applied, scratches on the piston rod surface.

1. To affordable, Product range, fast delivery.
2. Product specifications more than 30,000 kinds of stocks over 50 million.
3. TO provide customers with professional technical and services for engineers.
4. Which can provide Seals provide customersa with a variety of sealing solutions.

We maintain a large inventory of standard V99F JIS B2403 V-Seal V-Packing to ensure fast delivery and meet your urgent needs. Our inventory and delivery time details are as follows:
- Inventory Status: In stock, ready for immediate shipment. We update our inventory in real time; if the order quantity exceeds the current inventory, we will arrange production immediately, and the production cycle will be 3-5 working days for standard products.

- Delivery Time:
        

  - For orders ≤ 50 pieces: Shipped within 2-3 working days after payment confirmation.

  - For orders 100~500 pieces: Shipped within 5-7 working days after payment confirmation.

  - For orders > 500 pieces or custom orders: Shipped within 15 working days after production completion (production cycle depends on customization requirements).

- Shipping Methods: We cooperate with international logistics companies (DHL, FedEx, UPS, TNT, and EMS) to provide fast and reliable shipping services. You can choose the shipping method according to your needs:
       

  - Express Shipping (DHL/FedEx/UPS/TNT): 3-7 working days to most countries and regions, suitable for urgent orders.

  - Air Freight: 7-10 working days, suitable for large-quantity orders with lower cost than express shipping.

  - Sea Freight: 20-35 working days, suitable for bulk orders with the lowest shipping cost.

- Shipping Cost: The shipping cost depends on the order quantity, shipping method, and destination country/region. We will provide you with the most competitive shipping quote after you place the order. We can also use the carrier of your choice if needed.

- Tracking Information: After shipment, we will send you the tracking number via email or message, allowing you to track the package status in real time until it is delivered safely. We will also follow up on the shipment progress and solve any logistics problems in a timely manner.