I. Descrição geral do produto
The HZT038218900 mechanical shaft seal is one of the core sealing components of the HZT023280010 (25MBA marine vacuum sewage pump). It is installed between the HZT023260400 (distance sleeve) and the HZT023280030 (shaft seal flange).
It forms a complete dynamic sealing system with the HZT023219000 (rotor housing), HZT023219100 (pressure chamber), and HZT021265401 (rotor).
This component’s primary function is to prevent vacuum leakage at the shaft penetration point and ensure the integrity of the negative pressure chamber within the pump body. It forms a stable gas-liquid barrier through the liquid film on the end faces of the dynamic and static rings, making it a key component in achieving high vacuum and high-endurance operation in the 25MBA pump.
II. Structure and Materials
| Components | Materials | Functional Description |
| ——————- | ——————- | ————————– |
| Rotary Ring | Carbon Graphite | Rotates with the shaft, forming a friction seal with the stationary ring |
| Stationary Ring | SIC (Silicon Carbide) | Installed in the flange, remains stationary, forming a sealing surface |
| Spring and Metal Parts | Stainless Steel (CNC Machined) | Provides elastic force and corrosion-resistant support |
| Seal Ring | NBR / EPDM | Absorbs axial vibration, compensates for variations in the gap between the rotary and stationary rings, and ensures a stable sealing compression ratio |
Manufacturing Process
* Precision CNC Machining
* End Surface Lapping (Lapping) Flatness ≤ 2µm
* Dynamic Balancing Test and Vacuum Seal Test (-0.09MPa for 72 hours, no leakage)
* All components undergo corrosion salt spray testing and temperature resistance testing
III. Performance Advantages
1️⃣ High Vacuum Sealing Capability
The end-face liquid film seal principle ensures stable negative pressure in the pump chamber, making it suitable for vacuum sewage and vacuum toilet systems.
2️⃣ Superior Corrosion and Wear Resistance
The SIC+316SS composite material construction enables long-term operation in seawater, blackwater, and solid-contaminated wastewater.
3️⃣ High-Precision Matching Structure
Precision fit with the HZT023260400 (spacer sleeve) and HZT023280030 (flange) for easy assembly and stable sealing.
4️⃣ Long-Life Operation
The carbon graphite friction surface exhibits extremely low wear (friction coefficient μ≈0.08), resulting in low operating noise and a long lifespan.
5️⃣ Highly Maintainable and Replaceable
The modular structure allows for quick replacement and is compatible with the same series of vacuum pumps (HZT25MBA / HZT15MBD differ only in structure).
IV. Applications
The HZT038218900 is not only suitable for the HZT023280010 (25MBA marine vacuum sewage pump), but is also widely used in the following systems and equipment:
* 🚢 Marine & Yacht Vacuum Sewage Systems
* 🛳 Offshore Vacuum Discharge Systems
* ⚓ Port & Harbor Vacuum Stations
* 🚽 Land-Based & RV Vacuum Toilet Systems
* 🧱 Vacuum Sewage Collection & Sanitary Units
With its excellent sealing performance and durable materials, the HZT038218900 is a reliable vacuum sealing solution for ships, yachts, and offshore applications.
V. Apoio técnico e fornecimento
A HZT fornece equipamento completo, conceção de sistemas e serviços acessórios:
* Soluções completas para bombas de vácuo marítimas e estações de bombagem de vácuo para águas residuais
* Sistema OEM e suporte de estaleiro
* Fornecimento rápido de peças e serviço de reparação
📧 Email de apoio técnico: SJDT1199@gmail.com
🌐 Sítio Web oficial: www.vacuumtoiletparts.com
1. HZT029151001 - Sede da válvula de lamelas
2. HZT037302200 - Disco da válvula de lamelas
3. HZT029151003 - Placa de pressão
4. HZT029150310 - Tampa da câmara de aspiração
5. HZT037219210 - Anel de vedação
6. HZT029150320 - Câmara de aspiração
7. HZT020202900 - Vedante de encaixe hexagonal
8. HZT029151900 - Porca de bloqueio
9. HZT029150400 - Lâmina rotativa
10. HZT029150500 - Lâmina estacionária
11. HZT029152401 - Parafuso hexagonal de meia rosca com anilha de pressão (M10x170)
12. HZT029150601 - Flange de extremidade
13. HZT029150701 - Rotor (impulsor)
14. HZT029150800 - Caixa do rotor
15. HZT029151800 - Espaçador
16. HZT038201500 - Vedante do veio
17. HZT034507420 - Braçadeira da mangueira
18. HZT034507500 - Mangueira
19. HZT029150391 - Flange de vedação do veio
20. HZT029150901 - Câmara de pressão (câmara de descarga de água)
21. HZT029150310-02 - Tampa de aspiração (placa metálica)
22. HZT029150450 - Conjunto do cortador
23. HZT/- - Motor - 2.2kW - Motor marítimo
24. HZT029015001 - Bomba de vácuo de 15MBD
25. HZT023280061 - Sede da válvula de lamelas
26. HZT037302100 - Disco da válvula de lamelas
27. HZT023280091 - Placa de pressão
28. HZT023280050 - Tampa da câmara de aspiração
29. HZT037219260 - O-ring
30. HZT023280070 - Fixador de flange
31. HZT023280080 - Flange
32. HZT023280040 - Câmara de aspiração
33. HZT020202900 - Ficha
34. HZT020203100 - Lâmina rotativa
35. HZT020203100 - Lâmina estacionária
36. HZT021201000 - Suporte da lâmina
37. HZT036202010 - Parafuso hexagonal de meia rosca (com anilha de mola) M12x220
38. HZT023200210 - Placa da extremidade da câmara de aspiração
39. HZT023219000 - Carcaça do rotor
40. HZT021265401 - Rotor (Impulsor)
41. HZT021217000 - Ficha RG 3/8
42. HZT023219000 - Câmara de pressão (câmara de descarga)
43. HZT023260400 - Manga de isolamento
44. HZT038218900 - Vedante do veio
45. HZT023280030 - Flange de vedação do veio
46. HZT023280050-02 - Tampa da câmara de aspiração (chapa metálica)
47. HZT/- - Motor - 3,0 kW - Motor marítimo
48. HZT023280010 - Bomba de vácuo de 25 MBA
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