The HZT029152401 half-thread external hexagonal bolt assembly (Bolt M10×170) is a key fastener used to connect the first end flange (HZT029150601) to the pressure chamber/motor cover (HZT029150901) in the HZT 15MBD marine vacuum sewage pump system.
Each pump uses four of these bolts. The combination of a flat washer and a spring washer provides durable and reliable axial preload, ensuring the stability of the vacuum seal structure during long-term operation.
I. Structure and Manufacturing Features
* Partial Thread Design:
The front section of the bolt uses a polished rod for positioning, while the rear threaded section provides tightening torque, achieving integrated assembly positioning and tightening.
* SUS304 stainless steel (grade A2-70):
Excellent salt spray and corrosion resistance, suitable for long-term use in marine, high-humidity, and acidic and alkaline environments.
* Surface Treatment: Passivation + Electropolishing
Improves rust resistance and surface finish while preventing galvanic corrosion.
* High-Precision Machining:
The threads are precision rolled, and the coaxiality of the polished rod and threaded section is strictly controlled, ensuring smooth assembly between the end flange and the motor cover.
* Supporting Components:
Includes one flat washer and one spring lock washer for enhanced tightening and anti-loosening performance.
II. Function and Assembly Logic
This bolt is located at the discharge section of the vacuum pump and is used to secure the connection between the end flange (HZT029150601) and the pressure chamber (HZT029150901).
A four-point evenly distributed structure provides high-strength fixing between the motor end and the pump body, ensuring:
* ⚙️ Reliable pressure sealing – preventing leakage of high-pressure water vapor from the discharge end;
* 🧩 Stable assembly accuracy – The polished rod is positioned to prevent misalignment and stress concentration;
* 🔩 Excellent anti-loosening and anti-vibration performance – A combination of flat washers and spring washers mitigates the risk of vibration loosening;
* 💧 Long-term corrosion resistance – The electrolytic treatment of SUS304 steel ensures long-term marine operation onboard ships.
III. Application and System Location
The HZT029152401 is installed in the discharge section at the rear end of the pump body and is a key mechanical connection between the discharge chamber and the motor support end of the vacuum sewage pump.
This area is simultaneously subject to:
* axial force transmitted by the motor;
* reaction force from the internal pressure of the pump chamber;
* system vibration and temperature cycling.
Therefore, a non-standard length (170mm) and a semi-smooth rod structure are used to balance strength, precision, and assembly stability.
IV. Industry Applications
HZT029152401 is widely used in:
* 🚢 Marine Vacuum Sewage and Blackwater Discharge Systems
* ⚙️ Vacuum Toilet Systems
* 🛳️ Offshore Wastewater Treatment Units
* 🧰 Vacuum Pump Maintenance Parts
V. Asistencia técnica y suministro
HZT ofrece servicios completos de equipamiento, diseño de sistemas y accesorios:
* Soluciones integrales para bombas de vacío marinas y estaciones de bombeo de vacío de aguas residuales
* Sistema OEM y asistencia a astilleros
* Fast parts supply and repair services
📧 Correo electrónico de asistencia técnica: SJDT1199@gmail.com
🌐 Página oficial: www.vacuumtoiletparts.com
1. HZT029151001 – Flap valve base
2. HZT037302200 – Flap valve disc
3. HZT029151003 – Pressure plate
4. HZT029150310 – Suction chamber cover
5. HZT037219210 - Junta tórica
6. HZT029150320 - Cámara de aspiración
7. HZT020202900 - Tapón de cierre con hexágono interior
8. HZT029151900 - Contratuerca
9. HZT029150400 - Cuchilla giratoria
10. HZT029150500 – Fixed blade
11. HZT029152401 – Half-threaded hexagon bolt (M10x170) with spring washer
12. HZT029150601 - Brida final
13. HZT029150701 – Rotor (Impeller)
14. HZT029150800 – Rotor Housing
15. HZT029151800 - Espaciador
16. HZT038201500 – Shaft Seal
17. HZT034507420 – Hose Clamp
18. HZT034507500 - Manguera
19. HZT029150391 - Brida de sellado del eje
20. HZT029150901 – Pressure Chamber (Discharge Chamber)
21. HZT029150310-02 – Suction Cover (Metal Sheet)
22. HZT029150450 – Blade Assembly
23. HZT/- – Motor – 2.2 kW – Marine Motor
24. HZT029015001 - Bomba de vacío 15MBD
25. HZT023280061 - Asiento de válvula Flap
26. HZT037302100 - Disco de válvula Flap
27. HZT023280091 - Placa de presión
28. HZT023280050 - Tapa de la cámara de aspiración
29. HZT037219260 – O-Ring
30. HZT023280070 - Sujetador de brida
31. HZT023280080 - Brida
32. HZT023280040 - Cámara de aspiración
33. HZT020202900 - Enchufe
34. HZT020203100 - Cuchilla giratoria
35. HZT020203100 – Fixed Blade
36. HZT021201000 - Portacuchillas
37. HZT036202010 – Half-threaded Hexagon Bolt (with Spring Washer) M12x220
38. HZT023200210 - Placa final de la cámara de aspiración
39. HZT023219000 - Carcasa del rotor
40. HZT021265401 - Rotor (Impulsor)
41. HZT021217000 - Tapón RG 3/8
42. HZT023219000 - Cámara de presión (Cámara de descarga)
43. HZT023260400 – Spacer Sleeve
44. HZT038218900 - Junta del eje
45. HZT023280030 - Brida de sellado del eje
46. HZT023280050-02 – Suction Chamber Cover (Metal Plate)
47. HZT/- – Motor – 3.0kW – Marine Motor
48. HZT023280010 – 25MBA Vacuum Pump
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