Frequently Asked Questions about Topa Hydraulic Cylinders

We manufacture welded, tie-rod, telescopic, and custom hydraulic cylinders for a wide range of industrial, agricultural, and mobile applications.

Select based on working pressure, mounting type, stroke length, and operating environment. Our team can recommend the most suitable model for your system.

Tie-rod cylinders are easy to maintain and commonly used in industrial systems. Welded cylinders are more compact and robust, ideal for mobile and construction equipment.

Yes, we supply both single-acting and double-acting cylinders. Single-acting uses pressure in one direction, while double-acting provides force in both extension and retraction.

Standard models range from 16 MPa to 35 MPa (2,300–5,000 PSI). Custom high-pressure designs can be developed based on your requirements.

Cylinder tubes are typically honed carbon steel or stainless steel. Piston rods are usually hard chrome-plated or nickel-plated for corrosion resistance.

We offer chrome, nickel, zinc, or black oxide coatings, depending on the working environment and corrosion protection requirements.

Yes. You can send your 2D/3D drawings or a sample. Our engineers will confirm all dimensions and tolerances before production begins.

We use high-quality seals from brands such as Hallite. They are designed so they can be replaced easily during routine maintenance.

We typically manufacture bore sizes from 25 mm to 500 mm, and stroke lengths up to 3000 mm, depending on the cylinder type and application.

Every cylinder undergoes pressure testing, leakage inspection, and dimensional verification before it is packed for shipment.

Yes. We can provide inspection reports, material certificates, and pressure test results upon request.

We use precision CNC machines and surface roughness testers to maintain Ra ≤ 0.2 µm and keep tight dimensional tolerances.

Yes, each cylinder is tested at 1.5 times its rated pressure to confirm reliable performance with zero leakage.

Yes, our hydraulic cylinders are designed to meet relevant ISO 6020/6022 standards and CE certification requirements for export.

Yes. We specialize in OEM and custom hydraulic cylinders designed to match your specific technical and application requirements.

Please share bore size, stroke length, working pressure, mounting style, port size, and working environment so we can design the correct cylinder.

Yes. We can engrave your logo on cylinders and create custom packaging that reflects your brand identity.

Absolutely. Our engineers design cylinders for heavy-duty equipment, agricultural machinery, industrial presses, and many other special applications.

Development and production typically take 20–35 days after drawing confirmation, depending on order volume and design complexity.

Pricing is based on materials, bore and stroke size, working pressure, and the level of customization required.

Standard lead time is usually 25–30 days. For urgent orders, we can shorten the schedule after confirming the details with you.

Yes. We offer tier-based pricing for larger quantities and long-term cooperation projects.

Yes. We can set up fast-track production for priority projects after discussing your delivery timeline and technical requirements.

We support CIF, FOB, or DDP terms and provide full export documentation, including packing lists, invoices, and certificates as needed.

Ensure proper alignment, use compatible fittings, and tighten all connections to the recommended torque to avoid stress, leakage, or premature wear.

We recommend clean ISO VG 32–68 hydraulic oil. Keep the oil free of water and contaminants to extend cylinder and seal life.

Seal replacement intervals are usually every 1–2 years, depending on working conditions, load cycles, and maintenance practices.

Common signs include external oil leakage, jerky or unsteady movement, reduced pressure, or unusual noise during operation.

Yes, most cylinders can be rebuilt with new seals and replacement parts, which can be more cost-effective than full replacement.

We provide a 12-month warranty from the shipment date against manufacturing defects under normal operating conditions.

We analyze the issue, provide technical feedback, and offer replacement units or credit depending on the final investigation result.

Yes, we stock seals, rods, and other key components to support long-term maintenance and service needs.

Yes. Our engineers are available for online guidance, documentation support, and video calls for troubleshooting when needed.

We keep complete production records, use stable processes, and maintain consistent quality and lead time for every repeat order.