I. Descripción general del producto
The HZT029150391 seal end flange is a fixed component of the shaft seal assembly of the HZT 15MBD marine vacuum sewage pump. It supports and compresses the stationary ring of the HZT038201500 mechanical seal, ensuring coaxiality between the seal end and the motor shaft and providing gas-liquid isolation.
This flange is a one-piece CNC-machined part made of 316 stainless steel. Its high-precision circular cavity directly engages and secures the rubber sleeve (the outer layer of the O-ring) on the mechanical seal’s outer ring, creating a stable and reliable seal. It mates with the motor cover at the rear to form the rear-end sealing structure of the pump body.
II. Structure and Function
1️⃣ Structural Features:
* Disc-shaped flange with no external bolt holes;
* Centered recessed groove for accommodating the HZT038201500 stationary ring assembly;
* A stoppered surface at the bottom of the inner cavity ensures consistent seal compression depth;
* The back surface is flat and seals against the motor cover end face.
2️⃣ Assembly Method:
* The outer rubber sleeve (NBR) of the stationary ring forms an interference fit with the inner bore of the flange.
The seal is secured by inserting and clamping, eliminating the need for additional bolts.
* The front end is in close contact with the spacer sleeve (HZT029151800) and the dynamic ring sealing surface,
while the rear end is precisely aligned with the motor cover.
3️⃣ Main Functions:
* Secures and tightens the mechanical seal’s static ring;
* Prevents shaft seal displacement or rotation;
* Provides end seal support and assembly datum;
* Ensures overall stability of the sealing system between the motor and pump body.
III. Materials and Craftsmanship
* Material: 316 stainless steel (Marine Grade 316SS).
* Craftsmanship: Entire component is CNC precision turned, resulting in high surface accuracy and a roundness tolerance of ≤0.02mm.
* **Surface Treatment**: Original metallic gloss finish, retaining the natural turning texture, corrosion-resistant, and easy to clean.
* Manufacturing Features:
* End face parallelism ≤0.03mm;
* Inner cavity stop depth consistency ±0.05mm;
* Full dimension inspection to ensure a perfect fit with HZT038201500.
IV. Installation and Fitting
* Press the HZT038201500 mechanical seal stationary ring at the front end;
* Connect to the motor cover (15MBD) at the rear end;
* Use the HZT029151800 spacer sleeve for axial positioning;
* This forms an integrated sealing structure, ensuring complete isolation of the vacuum chamber.
V. Performance Advantages
✅ High-precision matching: The inner groove and the mechanical seal stationary ring have an interference fit, ensuring stable positioning.
✅ Corrosion-resistant structure: Machined from 316 stainless steel, suitable for seawater and sewage environments.
✅ Easy maintenance: Boltless construction allows for quick assembly and disassembly; seal replacement is easy.
✅ High vacuum reliability: Ensures a complete seal between the shaft seal assembly and the rear end of the pump body, preventing vacuum leaks.
VI. Typical Applications
* HZT 15MBD Marine Vacuum Sewage Pump
* Marine Sewage & Vacuum Toilet System
* Black & Grey Water Vacuum Units
* Industrial Vacuum Transfer Pumps
VII. Quality Inspection and Control
* Full inspection of outer diameter, inner cavity, and groove depth;
* Surface finish Ra ≤ 1.6;
* Assembly Verification: Actual seal performance test in accordance with HZT038201500;
* Salt spray test ≥ 480 hours
8. 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
* Suministro rápido de piezas y servicios de reparación
📧 Correo electrónico de asistencia técnica: SJDT1199@gmail.com
🌐 Página oficial: www.vacuumtoiletparts.com
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