The HZT020202900 external hexagonal sealing plug is a sealing component for water injection and exhaust at the top of the suction chamber of the HZT 15MBD marine vacuum sewage pump system. It is used for water injection before vacuum pump startup and system exhaust sealing.
Made using CNC precision machining of 316 stainless steel, this plug features an M20×1.5 metric external hexagonal fine thread design, providing a smooth thread surface and reliable sealing. A highly elastic O-ring is located at the base of the thread, providing dual leak protection.
I. Structure and Manufacturing Advantages
* High-Precision CNC Processing: Entirely machined from 316 stainless steel bar stock, ensuring thread accuracy and sealing surface finish;
* Fine Thread Design: M20×1.5 fine threads provide increased contact density and sealing reliability;
* O-ring Seal: Combined with precision-machined grooves, it forms an elastic seal, preventing gas and liquid leakage;
* Corrosion Resistance: 316 stainless steel withstands seawater, acid, alkali, and wastewater environments for extended periods;
* Versatile: Compatible with HZT series 15MBD vacuum pumps and vacuum sewage systems.
II. Compatibility (⚠️ Important Information)
HZT020202900 is not compatible with the JETS system.
JETS vacuum pumps use 1/2″ NPT thread connections, while the HZT series utilizes M20×1.5 fine-pitch metric threads.
This difference stems from different design standards:
The HZT’s M20×1.5 fine-pitch thread structure provides stronger sealing force and smaller leak gaps within the same space, and can maintain tightness even after repeated assembly and disassembly.
Forcing the assembly into a JETS system can result in thread mismatch and seal failure.
Please confirm thread specifications before purchasing to avoid mismatching.
III. Function and System Application
The HZT020202900 sealing plug is installed in the water injection holes on both sides of the HZT029150320 suction chamber and is used for:
* Filling the vacuum pump with water and fluid before initial operation;
* Releasing gas during maintenance or overhaul;
* Sealing during long-term operation.
This component ensures airtightness during startup, operation, and shutdown of the vacuum system and is a key component for stable system operation.
IV. Applications and Industries
Widely used in:
* 🚢 Marine Sewage Vacuum Collection Systems
* ⚙️ Vacuum Toilet & Black Water Units
* 🛳️ Offshore Wastewater Discharge Units
The HZT020202900, with its CNC precision, 316 steel, and fine-thread seal design, is an indispensable and reliable sealing component in marine vacuum systems.
V. 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
* Fast parts supply and repair services
📧 Technical Support Email: SJDT1199@gmail.com
🌐 Official Website: www.vacuumtoiletparts.com
1. HZT029151001 – Flap valve base
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 – Fixed blade
11. HZT029152401 – Half-threaded hexagon bolt with spring washer, M10x170 mm
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 end flange
20. HZT029150901 – Pressure chamber (discharge chamber)
21. HZT029150310-02 – Suction cover (metal plate)
22. HZT029150450 – Blade 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 – Rotary 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 (Water Discharge Chamber)
43. HZT023260400 – Spacer Sleeve
44. HZT038218900 – Shaft Seal
45. HZT023280030 – Shaft Seal Flange
46. HZT023280050-02 – Suction Chamber Cover (Metal Plate)
47. HZT/- – Motor – 3.0kW – Marine Motor
48. HZT023280010 – 25MBA Vacuum Pump
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