HZT Marine Sewage Vacuum Interface Unit | 316L stainless steel gray-black tank vacuum interface assembly, high-reliability vacuum sanitary system core unit (5L / 7L / 10L) 5L-HZT6545873 7L-HZT6541672 10L-HZT6542601 Compatible with EVAC

HZT-EVAC Vacuum Interface Unit | 316L Stainless Steel Gray and Black Water Tank Vacuum Interface Assembly – High-Reliability Core Unit for Vacuum Sanitation Systems (5L / 7L / 10L)

1. Product Overview
The HZT-EVAC Vacuum Interface Unit (VUI) is an integrated vacuum interface device designed for vacuum drainage and management of gray and black water in vacuum toilet systems on ships, yachts, passenger vessels, and land-based systems.

This series includes three capacity sizes: 5L (HZT6545873), 7L (HZT6541672), and 10L (HZT6542601). All are made of 316L stainless steel and can replace or be compatible with similar interface units in international brand EVAC systems.

This product enables rapid wastewater collection and intermittent discharge under vacuum pressure, and can be automatically opened and closed by a solenoid control valve. It is a key connection and control module for vacuum wastewater treatment systems.

2. Materials and Craftsmanship
The entire unit is welded from 316L stainless steel, offering excellent resistance to corrosion, chloride stress cracking, and biofouling.

Interfaces undergo CNC machining, electrolytic polishing, and argon arc welding to ensure a smooth, residue-free interior surface. Each vacuum interface unit undergoes vacuum sealing testing (–0.08 MPa pressure hold for 30 minutes) and airtightness testing to ensure long-term stable operation in blackwater and marine environments.

The electrically controlled valve body and float sensor feature a corrosion-resistant and waterproof design, making them suitable for use in ship engine rooms, vacuum stations, and underground sewage collection wells.

3. Structure and Technical Features
a) Integrated vacuum interface module, including a vacuum chamber, float level control valve, solenoid bleed valve, and quick-release fittings;
b) 316L stainless steel construction allows for direct connection to a marine blackwater/graywater collection tank or vacuum main;
c) The float mechanism is sensitive and reliable, preventing misjudgment of liquid levels and secondary suction;
d) Valve body interface dimensions conform to international standards such as RG3/8, DN25, and DN32;
e) Compact design for easy installation and maintenance;
f) Compatible with mainstream EVAC system control logic, it can replace the original interface unit.

When used in conjunction with a vacuum pump and control box, this unit provides automatic suction and release, with fast cycle times, low noise, and thorough drainage.
The 316L material ensures long-term stability and a clean appearance in high-humidity, high-salt, and highly corrosive environments.

4. Application Areas
The HZT vacuum interface unit is widely used in:
a) Vacuum sewage systems for various vessels (yachts, cruise ships, ro-ro passenger ships, and naval auxiliary vessels);
b) Domestic sewage treatment systems for offshore platforms, drillships, and FPSOs;
c) Land-based vacuum toilet systems, vacuum pumping stations, and environmentally friendly sewage collection projects;
d) Recreational vehicles (RVs), mobile vacuum sanitation systems, and vacuum toilets at campsites;
e) Water-saving vacuum sewage systems for airports, train stations, and office buildings.
This series of products is compatible with international vacuum system standard interfaces and is suitable for vacuum control platforms from brands such as EVAC and Jets, providing customers with highly interchangeable and low-maintenance OEM solutions.

5. Professional Summary
The HZT-EVAC Vacuum Interface Unit (VUI) is the core control module for ship and land-based vacuum sewage systems, combining mechanical and vacuum fluid engineering features.
It utilizes a one-piece 316L stainless steel structure and an electronically controlled automatic valve design to ensure long-term, leak-free operation in marine and industrial environments.

This series (5L/7L/10L) is compatible with standard EVAC system interfaces and can serve as reliable replacement and expansion components, providing efficient, low-noise, and maintenance-free vacuum interface solutions for vacuum pumping stations and water-saving sanitary systems.

5L-HZT6545873

7L-HZT6541672

10L-HZT6542601

6. 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 sealing plug
8. HZT029151900 – Lock nut
9. HZT029150400 – Rotating blade
10. HZT029150500 – Stationary blade
11. HZT029152401 – Half-threaded hexagon bolt with spring washer (M10x170)
12. HZT029150601 – End flange
13. HZT029150701 – Rotor (impeller)
14. HZT029150800 – Rotor housing
15. HZT029151800 – Spacer sleeve
16. HZT038201500 – Shaft seal
17. HZT034507420 – Hose clamp
18. HZT034507500 – Hose
19. HZT029150391 – Shaft seal flange
20. HZT029150901 – Pressure chamber (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 – Fixed 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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