1. Product Overview
The HZT023280070 flange fastener is a key mechanical fastener used to connect the suction and pressure chambers to the valve body assembly in the 25MBA vacuum sewage pump. This component ensures high-strength connections and stable sealing between flange interfaces. It is commonly used at structural joints such as the suction chamber (HZT023280040), the pressure chamber (HZT023219100), the valve seat (HZT023280061), and the rotor housing (HZT023219000).
This component operates for extended periods in high vacuum and black water environments and requires corrosion resistance, mechanical strength, and dimensional stability, ensuring the long-term, stable operation of the pump.
2. Materials and Craftsmanship
The HZT023280070 flange fastener is made of 316 stainless steel and undergoes CNC machining, thread rolling, heat treatment, and surface passivation.
This material offers strong resistance to chloride ion corrosion, making it suitable for long-term use in marine and marine environments. The threads are precision-machined to a pitch tolerance of ±0.03mm, ensuring smooth assembly.
Each fastener set consists of a bolt, nut, and washer. Sandblasting and electropolishing significantly enhance surface hardness and rust resistance. All fasteners have passed salt spray testing (≥480 hours), ensuring long-term, stable locking force in seawater, high humidity, and blackwater environments.
3. Structure and Technical Features
a) High-strength thread structure ensures the tensile strength and vibration resistance of the flange connection;
b) Entirely constructed from 316 stainless steel, it is resistant to salt spray, acids, alkalis, and chemical corrosion;
c) Precision thread rolling, combined with EPDM flange gaskets, creates a double-seal, leak-proof structure;
d) Suitable for internal and external connections in vacuum systems;
e) Reusable for easy maintenance, suitable for the entire 25MBA series. This fastener has been verified through dynamic load testing to maintain stable preload under frequent pump start-stop cycles, ensuring long-term, leak-free operation at the flange interface.
4. Applications
a) Marine Vacuum Discharge Pumps for ships and yachts;
b) Vacuum sewage treatment systems for passenger ships, cruise ships, offshore platforms, and drilling vessels;
c) Land-based vacuum toilets, sewage transfer, and environmental vacuum pipe networks;
d) Vacuum connections for recreational vehicles (RVs) and mobile sanitation systems;
e) Industrial fluid and vacuum sealing equipment requiring corrosion-resistant fastening structures.
This component is compatible with major international vacuum system structural standards and is a commonly used standard component in OEM and aftermarket replacements.
5. Related Materials and Adapter Components
* HZT023280040 Suction Chamber
* HZT023219100 Pressure Chamber
* HZT023219000 Rotor Housing
* HZT023280061 Flap Valve Base
* HZT037219SET O-Ring Seal Kit
These components together comprise the 25MBA vacuum pump’s sealing and structural support system, with flange fasteners playing a key role in this connection.
6. Professional Summary
The HZT023280070 flange fastener (Fastening for Flange) is a core component of the 25MBA vacuum sewage pump’s structural connection system. Made of 316 stainless steel, it undergoes CNC precision machining and a surface anti-corrosion treatment, ensuring high strength, vibration resistance, and long-term corrosion resistance. This component ensures long-term, leak-free operation of the pump flange interface in high vacuum and high humidity environments. It is suitable for use in vacuum toilet systems on ships, yachts, offshore platforms, and on land, and is compatible with major international vacuum system standards.
As an OEM assembly and maintenance replacement part, this product offers high versatility and technical competitiveness in the international trade market.
7. 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 service
📧 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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