A wave spring mechanical seal engineered as a direct OEM replacement for SPX APV centrifugal pumps, available in mechanical seal 40mm and mechanical seal 45mm shaft diameters to fit W, W+, and PUMA series. The open sinusoidal wave spring design resists product entrapment during CIP/SIP cycles, making this APV pump mechanical seal ideal for dairy, beverage, pharmaceutical, and food processing lines. With balanced face loading, compact axial length, and optional SiC/SiC or Carbon/SiC face combinations, our wave spring seals deliver hygienic, leak-free performance in viscous or particulate-laden fluids.
Key Features
• Wave Spring Hygiene: The sinusoidal wave spring mechanical seal design eliminates coil-spring crevices where bacteria harbor, ensuring thorough cleaning during CIP/SIP—the hygienic standardfor modern sanitary APV pumps.
• Compact Axial Fit: Provides high closing force in a short compressed length, allowing this mechanical seal 40mm / 45mm unit to fit compact APV pump stuffing boxes where traditional seals won't.
• High-Viscosity Capable: Strong drive pins and wave spring force keep seal faces closed under viscous loads (cream, yogurt, syrups), preventing face separation common with lighter-duty seals.
• Hygienic Flow Path: Promotes fluid circulation around faces during operation and cleaning, preventing product stagnation—essential for APV pump mechanical seal compliance in food & pharma.
•Balanced Loading: Wave spring applies uniform circumferential pressure to seal faces, reducing uneven wear and extending service life in continuous sanitary processing.
We understand that standard solutions don't always fit unique process challenges. Our wave spring mechanical seal can be fully customized to meet your specific application requirements beyond the standard 40mm and 45mm sizes.
Customizable Options
Shaft Size Adaptation: While we stock the popular mechanical seal 40mm and mechanical seal 45mm, we can engineer seals for other non-standard shaft diameters upon request.
Material Selection:
Seal Faces: Choose from SiC/SiC for abrasive service, Carbon/SiC for general duty, or Tungsten Carbide for extreme conditions.
Elastomers: Select EPDM for hot water/steam, FKM (Viton) for chemical resistance, or NBR for cost-effective general use.
Special Configurations: Available in single or double seal arrangements. Custom flush ports (API Plan 11, 13, 21, 32, 52) can be incorporated into the seal gland for the wave spring mechanical seal.
Hastelloy & Special Alloys: Metal components can be supplied in 316 Stainless Steel, Hastelloy C, or other alloys for highly corrosive environments.
Expertise in Wave Spring Technology: We specialize in the design and manufacture of wave spring mechanical seal units. Our expertise ensures optimal spring force calculation for your specific 40mm or 45mm APV pump, guaranteeing long-lasting, leak-free performance.
Focused APV Pump Knowledge: We are experts in APV pump sealing solutions. Our mechanical seal 40mm and mechanical seal 45mm are not generic parts; they are engineered with precise dimensions and tolerances for a perfect fit and function.
Superior Quality & Inventory: We use premium-grade materials and advanced CNC machining. We maintain substantial stock of the most common wave spring mechanical seal sizes, including the 40mm and 45mm variants, for fast delivery worldwide.
Global Support & Service: Our technical team provides application engineering support to help you select the right mechanical seal 40mm or 45mm configuration for your operating conditions, minimizing downtime and total cost of ownership.
Technical Specs | Materials | ||
Mediums | Sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, and nitric acid with various degrees. etc. | Stationary Ring | Ceramic/Sic/Ssic |
Pressure | ≤0.5MPa | Rotary Ring | Teflon/Sic/Ssic |
Temperature | -20℃ to 120℃ | Secondary Seal | Teflon |
Speed | ≤10m/s | Spring and Metal Part | Stainless Steel |


Product Specifications
| D1 (mm) | Size | D3 | D7 | D6 | L4 | L1 | L12 |
| 25 | 0250 | 60 | 60 | 47 | 27 | 42 | 45 |
| 30 | 0300 | 67 | 67 | 53 | 27 | 42 | 45 |
| 32 | 0320 | 69 | 64 | 50.7 | 27 | 42 | 45 |
| 35 | 0350 | 72 | 70 | 57 | 27 | 42 | 45 |
| 40 | 0400 | 78 | 76 | 62 | 26 | 42 | 45 |
| 45 | 0450 | 84 | 82 | 67 | 27 | 44 | 46 |
| 50 | 0500 | 88 | 86 | 72 | 27 | 46 | 46 |
| 55 | 0550 | 95 | 90 | 77 | 27 | 46 | 46 |
| 60 | 0600 | 100 | 95 | 82 | 27 | 46 | 46 |
| 65 | 0650 | 105 | 100 | 87 | 27 | 46 | 46 |
| 1" | 0254 | 60 | 54 | 42.86 | 17.5 | 42 | 45 |
| 1 1/8" | 0286 | 67 | 60 | 46.03 | 27 | 42 | 45 |
| 1 1/4" | 0317 | 69 | 65 | 50.8 | 27 | 42 | 45 |
| 1 3/8" | 0349 | 72 | 68 | 53.98 | 27 | 42 | 45 |
| 1 1/2" | 0381 | 76 | 71 | 57.15 | 27 | 42 | 45 |
| 1 5/8" | 0412 | 80 | 78 | 63.5 | 27 | 42 | 45 |
| 1 3/4" | 0444 | 84 | 81 | 66.68 | 27 | 44 | 46 |
| 1 7/8" | 0476 | 86 | 84 | 69.85 | 27 | 44 | 46 |
| 2" | 0508 | 90 | 87 | 73.03 | 27 | 46 | 46 |
| 2 1/8" | 0539 | 95 | 97 | 79.38 | 33.5 | 46 | 46 |
| 2 1/4" | 0571 | 98 | 100 | 82.55 | 33.5 | 46 | 46 |
| 2 3/8" | 0603 | 100 | 103 | 85.73 | 33.5 | 46 | 46 |
Workshop
This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.




Product Research, Development and Testing
Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All wave spring mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.




Industry Solutions




Case Study
Yogurt Production: A yogurt plant had issues with coil springs clogging with product. We switched them to this Wave Spring mechanical Seal. The open design cleaned out perfectly during CIP, eliminating bacterial counts in swab tests.
Testimonials
The wave spring design is much cleaner than the old coil springs. Essential for our dairy compliance.
—QA Manager, Dairy Plant
FAQs
Q: Is the wave spring stronger than a coil spring?
A: It provides equivalent force but in a smaller space. It is less prone to clogging, which is its main advantage in sanitary applications.
Q: My APV pump has a 40mm shaft. Is your seal a direct replacement?
A: Yes, our mechanical seal 40mm is designed as a direct OEM replacement for APV pumps with a 40mm shaft diameter, such as certain models in the W+ and PUMA series. It matches the original dimensions and interface.
Q: What are the advantages of a wave spring over a coil spring in a mechanical seal?
A: A wave spring mechanical seal offers several key advantages: it provides more uniform face loading, is less prone to clogging with viscous products, has a more compact design, and is better at compensating for minor shaft misalignment and thermal expansion. This makes it ideal for sanitary APV pump applications.

Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
E-mail: gechacha@aliyun.com
Mobile: +86-18758835650
WhatsApp: +86-18758835650
Add: No8-2, Jinsha road Yuelin Street, Fenghua District, Ningbo, Zhejiang