HZT023219000 Rotor Housing — 25MBA Marine Vacuum Sewage Pump High-Strength Rotor Housing | 316 Stainless Steel, Finished Turned | High-Vacuum Sealed Chamber Structure | Suitable for Ships, Yachts, Offshore, and Land-Based Vacuum Toilet Systems; JETS Compatible .

I. Product Positioning (Model + Function + Support)

The HZT023219000 rotor housing is a key fixture in the HZT 25MBA marine vacuum discharge pump. Its core function is to create a stable high-vacuum chamber and provide precise coaxial rotation for the rotor HZT021265401. This housing mates with multiple components within the 25MBA series:

* Front: Mate with the HZT023200210 End Plate Suct. Chamber (suction side)
* Rear: Mate with the HZT023280030 Flange (shaft seal end flange/rear flange)
* Axial sealing/locating: Mate with the HZT038281900 Shaft Seal (shaft seal) and the HZT023260400 Distance Sleeve (distance sleeve)

* This housing has a specific geometry and interface for the 25MBA and is not interchangeable with the 15MBD series.

II. Materials and Manufacturing

* Material: Marine-grade 316 stainless steel, offering corrosion resistance, strength, and fatigue resistance, suitable for marine and shore-based environments subject to high humidity, salt spray, and oily contaminants. * Manufacturing: CNC machining of the entire blank (inner bore, end face, seal groove, and flange face are all performed in a single process of positioning and finishing), ensuring inner roundness, end face accuracy, and concentricity.
* Surface: The inner wall is smooth, enhancing the stability of the gas-liquid mixed flow; the outer surface can be sandblasted or electropolished upon order to enhance corrosion resistance and cleanability.
* Dimensional Stability: Controlled assembly datums ensure low vibration and high sealing performance even when mated with the dynamically balanced rotor (HZT021265401).

III. Structure and Technical Features

1. High Vacuum Sealed Chamber
O-ring seals are reserved on the inner bore and end face, working in conjunction with the HZT038281900 (shaft seal) and corresponding O-rings to create a stable negative pressure chamber.

2. Coaxial and Axial Positioning

Compatible with the HZT023260400 (spacer sleeve) to control axial clearance; the flange surface of the HZT023280030 (rear flange) ensures coaxiality between the motor shaft, rotor, and housing.

3. Heavy-Duty/High-Flow Compatibility

Compatible with the increased rotor length and spiral geometry of the HZT021265401, it is suitable for vacuum pumping applications requiring higher flows and torques (multi-chamber systems and long-distance pipeline networks) than the 25MBA.

4. Maintenance-Friendly

Standardized flange and seal design facilitates periodic disassembly and inspection; it is compatible with other 25MBA series components, minimizing downtime.

IV. Application Areas

* Marine & Yacht Vacuum Discharge / Sanitation Systems (Blackwater/Graywater Vacuum Collection)
* Offshore Platforms: Offshore Vacuum Collection Unit, Rig Sanitation Module
* Ports/Shore-Based Systems: Harbor/Port Vacuum Station, Ship-to-Shore Discharge
* Land-Based Vacuum Toilet Systems: Land-Based Vacuum Toilet / Sewage Collection (Residential, Campsite, Scenic Area, Transportation Hub)

> Combined with HZT021265401 (Rotor), HZT023280030 (Flange), HZT023200210 (End Plate), HZT038281900 (Shaft Seal), etc.

> This constitutes the key assembly of the 25MBA pump head, maintaining extremely low noise, low vibration, and high vacuum in high-load operating environments both at sea and on land.

V. Selection and Maintenance Recommendations (Simple and Practical)

* Specificity: Compatible only with HZT 25MBA geometry and interfaces; not interchangeable with 15MBD.

* Assembly: It is recommended to strictly follow the 25MBA process diagram to control axial clearance and seal ring compression, and verify coaxiality.

* Maintenance: Periodically inspect O-rings and shaft seal HZT038281900 for wear and aging. If abnormal vibration is detected, verify rotor dynamic balancing and bearing condition.

* Retrofit/Replacement: In EVAC/JETS system upgrades and retrofits, this product can be used as a housing base component for 25MBA solutions, provided that the interfaces and flange surfaces are compatible with adapters.

VI. Technical Support and Supply

HZT provides complete equipment, system design, and accessory services:

* Comprehensive solutions for marine vacuum pumps and sewage vacuum pumping stations
* OEM system and shipyard support
* Rapid parts supply and repair services

📧 Technical Support Email: SJDT1199@gmail.com
🌐 Official Website: www.vacuumtoiletparts.com

1. HZT029151001 – Flap Valve Seat
2. HZT037302200 – Flap Valve Disc
3. HZT029151003 – Pressure Plate
4. HZT029150310 – Suction Chamber Cover
5. HZT037219210 – O-Ring
6. HZT029150320 – Suction Chamber
7. HZT020202900 – Hexagon Socket Seal
8. HZT029151900 – Lock nut
9. HZT029150400 – Rotating blade
10. HZT029150500 – Stationary blade
11. HZT029152401 – Half-threaded hexagonal bolt with spring washer (M10x170)
12. HZT029150601 – End flange
13. HZT029150701 – Rotor (impeller)
14. HZT029150800 – Rotor housing
15. HZT029151800 – Spacer
16. HZT038201500 – Shaft seal
17. HZT034507420 – Hose clamp
18. HZT034507500 – Hose
19. HZT029150391 – Shaft Seal Flange
20. HZT029150901 – Pressure Chamber (Water Discharge Chamber)
21. HZT029150310-02 – Suction Cover (Metal Plate)
22. HZT029150450 – Cutter Assembly
23. HZT/- – Motor – 2.2kW – Marine Motor
24. HZT029015001 – 15MBD Vacuum Pump
25. HZT023280061 – Flap Valve Seat
26. HZT037302100 – Flap Valve Disc
27. HZT023280091 – Pressure Plate
28. HZT023280050 – Suction Chamber Cover
29. HZT037219260 – O-ring
30. HZT023280070 – Flange Fastener
31. HZT023280080 – Flange
32. HZT023280040 – Suction Chamber
33. HZT020202900 – Plug
34. HZT020203100 – Rotating Blade
35. HZT020203100 – Stationary Blade
36. HZT021201000 – Blade Holder
37. HZT036202010 – Half-thread Hexagon Bolt (with Spring Washer) M12x220
38. HZT023200210 – Suction Chamber End Plate
39. HZT023219000 – Rotor Housing
40. HZT021265401 – Rotor (Impeller)
41. HZT021217000 – RG 3/8” Plug
42. HZT023219000 – Pressure Chamber (Discharge Chamber)
43. HZT023260400 – Isolation Sleeve
44. HZT038218900 – Shaft Seal
45. HZT023280030 – Shaft Seal Flange
46. HZT023280050-02 – Suction Chamber Cover (Metal Sheet)
47. HZT/- – Motor – 3.0 kW – Marine Motor
48. HZT023280010 – 25 MBA Vacuum Pump

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