HZT021217000 RG 3/8″ Plug | 316 Stainless Steel Vacuum Sealing Plug for 25MBA Marine Vacuum Pumps. Highly sealed maintenance port. Compatible with major vacuum systems (Marine, Yacht, Offshore, and Vacuum Toilet).

1. Product Overview
The HZT021217000 RG 3/8″ plug is a precision seal used in 25MBA vacuum sewage pump systems, used to close functional ports such as inspection ports, maintenance ports, and drain ports.

In vacuum systems, it can be installed at the suction chamber (HZT023280040) or pressure chamber (HZT023219100) ports to ensure vacuum integrity during system maintenance.

This component utilizes a standard RG 3/8″ imperial threaded connection and is compatible with a variety of vacuum systems. It offers excellent sealing, corrosion resistance, and pressure resistance, making it an essential standardized component for pump and piping maintenance.

2. Materials and Craftsmanship
The plug body is precision-machined from 316 stainless steel and features an EPDM or NBR seal to create a double seal.

The threads are CNC-rolled and precision-polished to ensure a tight fit with the valve body or cavity interface and smooth opening and closing.

The surface is sandblasted and electropolished to enhance corrosion and fouling resistance, making it suitable for long-term exposure to marine moisture and blackwater environments.

Each batch of products undergoes a 1.0 MPa pressure seal test and a 72-hour salt spray test to ensure long-term resistance to rust and leakage in high vacuum and humid environments.

3. Structure and Technical Features
a) Standard RG 3/8” threaded connection for easy installation and quick opening and closing;
b) 316 stainless steel main structure, resistant to seawater, acids, and alkalis;
c) EPDM elastomer seal for reliable sealing and high-temperature resistance;
d) Electrolytically polished surface for anti-fouling and anti-scaling;
e) Reusable assembly and disassembly for low maintenance.
This plug is suitable for system inspection ports, vacuum test points, and drain connections, effectively preventing air infiltration and liquid leakage, and maintaining a stable system vacuum.

4. Applications
The HZT021217000 plug is widely used in:
a) Marine vacuum discharge pump systems for ships, yachts, and passenger vessels;
b) Vacuum sewage collection and discharge equipment for offshore platforms and drilling vessels;
c) Vacuum toilets and domestic sewage networks in land-based buildings;
d) RV and mobile sanitary vacuum systems;
e) This is an inspection and maintenance interface for industrial vacuum equipment and liquid transfer systems.

Its standardized threads and high sealing performance make it compatible with major international vacuum system structures (compatible with major marine vacuum systems).

5. Related Materials and Components

* HZT023280040 Suction Chamber
* HZT023219100 Pressure Chamber
* HZT037219SET O-Ring Seal Kit
* HZT023280070 Flange Fastening
* HZT023280080 DN50 Flange
These components together constitute the 25MBA vacuum pump sealing and maintenance system.

6. Professional Summary
The HZT021217000 RG 3/8” plug is a key sealing component in the 25MBA vacuum sewage pump’s maintenance and inspection interface.
This pump features a 316 stainless steel body and EPDM seals, offering excellent corrosion resistance, pressure resistance, and sealing performance, ensuring long-term reliable sealing in marine, blackwater, and vacuum environments.

Suitable for use in vacuum toilet systems on ships, yachts, offshore platforms, and on land, it is compatible with international vacuum system interface standards and is a key component of the HZT brand’s high-reliability maintenance component line, effectively enhancing pump maintenance convenience and system operational safety.

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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