NBR Nitrile Rubber · High Vacuum Sealing Performance · Specialized Sealing Components for Marine Vacuum Pumps
I. Product Overview
The HZT037219210~HZT037221602 O-Ring Seal Set is the core sealing component for the HZT 15MBD marine vacuum sewage pump. Made of NBR nitrile rubber, this series of O-rings is specifically designed for the gas-liquid isolation system of vacuum pumps. They ensure reliable sealing and leak-proof operation in high-pressure, high-humidity, and corrosive environments.
This seal assembly covers key sealing areas of the pump body, including:
* Between the suction chamber (HZT029150320) and the suction chamber cover (HZT029150310);
* Between the end flange (HZT029150601) and the pressure chamber (HZT029150901);
* Between the shaft seal (HZT038201500) and the shaft seal end flange (HZT029150391);
* The connection area with the rotor housing (HZT029150800);
* As well as the outlet chamber and vacuum pipe interface.
II. Material Characteristics and Performance Advantages
Material: NBR (Nitrile Rubber)
1. High Sealing Performance
NBR rubber has excellent elasticity and resilience, maintaining seal integrity under alternating vacuum and positive pressure conditions.
2️⃣ Media Resistance
Suitable for a variety of media, including black water, gray water, lubricating oil, condensate, and seawater.
Excellent resistance to oil, salt spray, acids, and alkalis.
3️⃣ High Temperature and Aging Resistance
Operating temperature range: -30°C to +120°C; no cracking or hardening after long-term use.
4️⃣ Precision Fit
O-ring dimensions are precisely dimensioned and aligned with the tolerances of all HZT vacuum pump components, ensuring that compression and sealing gaps remain within ideal ranges during assembly.
5️⃣ Vacuum Deformation Resistance
Maintains a stable cross-sectional shape even under strong negative pressure, preventing flattening or displacement.
III. Compatible Components and Assembly Locations
| Material Code | Name | Functional Location |
| ———— | ———– | ———– |
| HZT037219210 | O-ring | Shaft seal assembly and end flange seal |
| HZT037219220 | O-ring | Suction chamber cover seal |
| HZT037219250 | O-ring | Pressure chamber and end flange seal |
| HZT037219200 | O-ring | Flap valve base and suction chamber seal |
| HZT037221602 | O-ring | Rotor housing and pressure chamber seal |
These seals form the leak-proof foundation of the entire unit’s gas-liquid isolation system and are among the most critical consumable parts during the assembly and maintenance of HZT vacuum sewage pumps.
IV. Applications
* 🚢 Marine Vacuum Sewage System
* 🧱 Black & Grey Water Pump System
* 🧰 Marine Vacuum Toilet Unit
* ⚙️ Industrial Vacuum Fluid Pumps
* 🛳 Marine Pump Spare Parts
V. Product Features
✅ Made of NBR nitrile rubber, it is oil-resistant, corrosion-resistant, and vacuum-resistant.
✅ Precisely matches the full range of HZT15MBD components, ensuring complete sealing.
✅ Anti-aging and long service life, suitable for long-term operation.
✅ Easy to replace, suitable for OEM and maintenance markets.
✅ All seals are airtight and vacuum leak tested.
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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