Frequently Asked Questions

A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage, containing pressure, or excluding contamination. In rotating equipment like pumps and mixers, a mechanical seal replaces traditional packing to provide a more reliable, leak-free sealing solution. It consists of two flat faces — one stationary and one rotating — that slide against each other, maintained in contact by a combination of hydraulic pressure and spring force.

Component Seals are individual seal parts (rotary, stationary, secondary seals, springs) that are assembled directly onto the pump shaft and into the seal chamber. They are cost-effective and compact but require more skill to install correctly.

Cartridge Seals come pre-assembled as a complete unit in a sleeve and gland plate. They are easier to install, reduce installation errors, and often include built-in features like tolerance rings. Cartridge seals are ideal for critical applications and API 682 compliance.

To select the right seal, you need to consider:

• Shaft diameter — the most critical dimension for sizing
• Operating pressure — determines balanced vs. unbalanced design
• Temperature range — affects elastomer and face material selection
• Media being sealed — chemical compatibility dictates material choices
• Speed (RPM) — influences seal face design and cooling
• Space constraints — cartridge vs. component seal decision

Not sure? Contact our team — we'll help you find the right seal within 12 hours.

YENNIX uses a simple 4-part code: Model – Seal Face – Elastomer – Metal

Example: M7N-A-V-S

• M7N — Seal model
• A — Silicon Carbide (SiC) seal face
• V — FKM (Viton) elastomer
• S — 304 Stainless Steel metal parts

This system lets you specify exactly what you need in one concise code. See our Products page for the full material code reference.

Our minimum order quantity is 1 set. Whether you need a single replacement seal or a bulk order, we can accommodate your needs. There's no penalty for small orders — we understand that downtime is costly and sometimes you just need one seal fast.

• Standard items (in stock): Same-day dispatch available for orders placed before 2:00 PM (CST). Typical delivery: 3–7 business days by express.
• Custom / made-to-order items: 15–25 working days, depending on complexity and quantity.
• Reverse engineering: 15–25 days from sample receipt to delivery.

We ship worldwide via DHL, FedEx, UPS, and other carriers. Urgent requirements? Let us know — we'll do our best to expedite.

Getting a quote is easy and free:

1. Online form: Fill out our contact form with your requirements
2. Email: Send details to sales@yennix.com
3. WhatsApp: Message us directly for quick quotes

For the fastest response, include: seal model, shaft diameter, operating conditions, and quantity. We typically respond within 12 hours.

Yes! Reverse engineering is one of our core strengths. If you have a seal that you can't find a replacement for — whether it's discontinued, from an obscure brand, or a custom OEM part — send us the sample. Our engineering team will:

1. Precision-measure all dimensions
2. Analyze materials
3. Create detailed engineering drawings
4. Manufacture replacement seals to original specifications

Typical turnaround: 15–25 days from sample receipt. Learn more about our reverse engineering process.

Yes. YENNIX seals are designed as direct replacements for major brands including:

• EagleBurgmann (M7N, MG1, MG12, M74D, M92N, etc.)
• John Crane (Type 1, Type 6, Type 10, Type 21, Type 4610, etc.)
• AESSEAL (B02, B05, CDSA, etc.)
• Flowserve (PAC-SEAL series, JD300, etc.)
• Vulcan (Type 48, Type 49, etc.)
• Flygt / Xylem (2051, 2052, 2055, etc.)

Use our Cross Reference tool to find the YENNIX equivalent, or ask our team for assistance.

Yes, we provide comprehensive OEM and ODM services:

• OEM: We manufacture seals to your specifications and brand requirements, including custom packaging, labeling, and documentation.
• ODM: Our engineering team can design seals from scratch based on your application requirements, then manufacture them under your brand.

With 9+ years of OEM supply experience for pump manufacturers worldwide, we understand the quality and consistency requirements of long-term partnerships.

All YENNIX seals come with a 12-month warranty against manufacturing defects from the date of shipment. This covers:

• Material defects
• Dimensional non-conformance to specifications
• Workmanship issues

If you experience any issues, contact us with photos and operating conditions. We'll assess the root cause and provide a replacement or credit. Our quality system is ISO 9001 compliant, and every seal undergoes rigorous inspection before shipment.

Common seal failures include:

• Dry running: Seal faces overheat without adequate lubrication. Ensure the seal chamber is always filled with fluid.
• Contamination: Abrasive particles damage seal faces. Consider a flush plan or filter.
• Misalignment: Shaft misalignment causes uneven face wear. Check alignment during installation.
• Wrong material: Chemical incompatibility leads to elastomer swelling or face degradation. Verify material compatibility with your media.
• Vibration: Excessive vibration shortens seal life. Address bearing wear, impeller imbalance, or cavitation.

Still having issues? Our engineers can help diagnose the problem.

Proper installation is critical for seal performance and longevity:

• Clean all parts — Remove all dirt, oil, and old seal residue from the shaft and seal chamber.
• Check shaft condition — Ensure no burrs, scratches, or wear on the shaft. Use a sleeve if the shaft is damaged.
• Lubricate O-rings — Apply a thin film of compatible lubricant before assembly.
• Do not over-compress — Follow the manufacturer's recommended working length. Over-compression damages seal faces.
• Verify alignment — Check that the stationary face is square to the shaft (within 0.05 mm TIR).
• For cartridge seals — Remove setting clips only after the gland bolts are fully tightened.

Need installation guidance? Contact our technical team.