Vertical Multi Stage Grundfos Pump Mechanical Seal 4MC-12A With Flange

Company Overview

Based in Ningbo, China, we are a professional factory specializing in the manufacture, installation, export and wholesale of high-performance industrial mechanical seals. Backed by strict ISO 9001 quality control systems, we deliver reliable sealing solutions to global industrial clients, covering a full spectrum of standard and custom sealing products for diverse fluid handling systems.

Our Core Product Range

We maintain an extensive product portfolio to meet different operational and工况 demands:

• Spring Seals: Single spring seals, balanced/unbalanced spring seals, multi-spring balanced seals, conical spring seals

• Bellow Seals: PTFE bellow externally mounted seals, rubber bellow seals, metal bellow seals, elastomer bellow seals

• Specialized Seals: Dry-running reverse balanced seals, agitator double-acting unbalanced seals, cartridge balanced seals, externally mounted seals

• Automotive & HVAC Seals: Air conditioning compressor seals, automotive cooling seals

Full-Series Pump Mechanical Seals

We provide direct replacement seals for nearly all mainstream pump brands on the market, ensuring seamless compatibility and easy installation: Flygt, Grundfos, APV, Grindes, Fristam, ABS, Alleeiler, EMU, GEA, Tunchenhagen, Godwin, Hidrostal, Hilge, Johnson, Lowara, Waukesha, Vogelsang and more. All pump seals are strictly tested to match or exceed original equipment performance standards.

Custom OEM / ODM Capability

Our in-house engineering and production team supports full customization services:

• Manufacture seals strictly according to your provided physical samples

• Produce products based on your official technical drawings

• Develop exclusive sealing solutions tailored to your specific working conditions, material requirements and performance targets We can turn your custom sealing concept into a certified, production-ready product within our standard delivery cycle.

Order & Delivery Terms

• Sample Service: Free samples are available for most standard models, you only need to cover the international shipping cost

• Lead Time: 10–20 days for standard and most custom orders

• Payment Methods: We accept both PayPal and T/T for flexible, secure global transactions

• Quality Assurance: Every product goes through multi-stage inspection before shipment to ensure consistent sealing performance and long service life

We focus on helping global industrial buyers reduce equipment downtime, lower maintenance costs and achieve stable, leak-free operation across chemical processing, water treatment, food & beverage, mining, HVAC and automotive industries.

1. ‌Are you a factory or a trade company?‌
   We are a professional mechanical seal manufacturer based in Ningbo, China, with our dedicated in-house international trade team to provide full-process export services for global clients.

2. ‌Can I get a sample before placing a formal order?‌
   Absolutely. Samples for most of our standard models are available free of charge, you only need to cover the international shipping cost. It is a very common way for our clients to test and verify product quality before bulk orders.

3. ‌Where is your factory located? How can I arrange a visit?‌
   Our factory is situated in Ningbo, China. You can take a direct flight to Ningbo Lishe International Airport, or fly to Shanghai Pudong Airport which is only around 2 hours' drive away from our facility. All clients, both domestic and overseas, are warmly welcomed to visit our production lines and quality control workshop at your convenience.

4. ‌What is your factory's quality control system like?‌
   Quality has always been our top priority. We implement strict full-process quality management from raw material incoming inspection, in-production parameter monitoring to final finished product performance testing. Our factory has been certified with ISO 9001 quality management system, to make sure every delivered product meets consistent high performance standards.

5. ‌What is your standard order lead time?‌
   For most standard models and custom sealing products, the delivery lead time is 10-20 days after we receive your prepayment. We will inform you in advance if there are any special circumstances that may affect the delivery schedule.

6. ‌What payment methods do you support?‌
   We offer flexible payment terms for different order sizes: for small sample shipping fees, both PayPal and T/T are acceptable. For large-volume formal orders, we support T/T at sight as the standard payment term.

7. ‌Do you support OEM and ODM customization services?‌
   Yes, we provide full-range OEM and ODM services for all our mechanical seal products. Our experienced engineering team can develop exclusive sealing solutions according to your specific working condition requirements, drawings or provided samples.

8. ‌Can I purchase pumps and related pump parts from you as well?‌
   Certainly. Besides the full series of mechanical seals, we also supply a complete range of supporting pumps and pump spare parts, including lobe pumps, compound & homogeneous pumps, homogeneous & emulsification pumps and other related fluid handling components.