I. Présentation du produit
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. Assistance technique et fourniture
HZT fournit un équipement complet, une conception de système et des services accessoires :
* Solutions complètes pour les pompes à vide marines et les stations de pompage sous vide des eaux usées
* Système OEM et soutien aux chantiers navals
* Approvisionnement rapide en pièces détachées et service de réparation
📧 Courriel de l'assistance technique : SJDT1199@gmail.com
🌐 Site web officiel : www.vacuumtoiletparts.com
1. HZT029151001 - Siège de soupape à clapet
2. HZT037302200 - Disque de soupape à clapet
3. HZT029151003 - Plaque de pression
4. HZT029150310 - Couvercle de la chambre d'aspiration
5. HZT037219210 - Joint torique
6. HZT029150320 - Chambre d'aspiration
7. HZT020202900 - Joint à douille hexagonale
8. HZT029151900 - Contre-écrou
9. HZT029150400 - Lame rotative
10. HZT029150500 - Lame stationnaire
11. HZT029152401 - Boulon hexagonal demi-fileté avec rondelle élastique (M10x170)
12. HZT029150601 - Bride d'extrémité
13. HZT029150701 - Rotor (roue)
14. HZT029150800 - Boîtier de rotor
15. HZT029151800 - Entretoise
16. HZT038201500 - Joint d'arbre
17. HZT034507420 - Collier de serrage
18. HZT034507500 - Tuyau
19. HZT029150391 - Bride d'étanchéité d'arbre
20. HZT029150901 - Chambre de pression (chambre d'évacuation de l'eau)
21. HZT029150310-02 - Couvercle d'aspiration (plaque métallique)
22. HZT029150450 - Assemblage de coupe
23. HZT/- - Moteur - 2.2kW - Moteur marin
24. HZT029015001 - Pompe à vide 15MBD
25. HZT023280061 - Siège de soupape à clapet
26. HZT037302100 - Disque de soupape à clapet
27. HZT023280091 - Plaque de pression
28. HZT023280050 - Couvercle de la chambre d'aspiration
29. HZT037219260 - Joint torique
30. HZT023280070 - Fixation de bride
31. HZT023280080 - Bride
32. HZT023280040 - Chambre d'aspiration
33. HZT020202900 - Bouchon
34. HZT020203100 - Lame rotative
35. HZT020203100 - Lame stationnaire
36. HZT021201000 - Porte-lame
37. HZT036202010 - Boulon hexagonal à demi-filet (avec rondelle élastique) M12x220
38. HZT023200210 - Plaque d'extrémité de la chambre d'aspiration
39. HZT023219000 - Boîtier de rotor
40. HZT021265401 - Rotor (Impeller)
41. HZT021217000 - Bouchon RG 3/8
42. HZT023219000 - Chambre de pression (chambre de décharge)
43. HZT023260400 - Douille d'isolation
44. HZT038218900 - Joint d'arbre
45. HZT023280030 - Bride d'étanchéité d'arbre
46. HZT023280050-02 - Couvercle de la chambre d'aspiration (feuille de métal)
47. HZT/- - Moteur - 3,0 kW - Moteur marin
48. HZT023280010 - Pompe à vide 25 MBA
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