Double Seal (Hydrogenerator)

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Double Seal (Hydrogenerator) Specification

Theory
Mechanical Seal for Rotating Equipment

Hardness
60-75 HRC (seal faces)

Application
Hydrogenerator, Power Plants, Large Pumps

Style
Double Seal

Material
Carbon, Silicon Carbide, Stainless Steel

Temperature
-20C to +180C

Pressure
Up to 16 bar

Speed
Up to 25 m/s

Function
Prevents leakage and retains fluid within hydrogenerators

Size
Custom sizes as per shaft diameter

Structure
Cartridge Double Mechanical Seal

About Double Seal (Hydrogenerator)

Material

Seal Ring Faces : Carbon and SiC
Seat Faces : SiC and and TC
Elastomer : Viton, TTV, FEP and FFKM
MOC : SS 316 CHANGE OF MOC ON REQUEST

Operating Capabilities

Shaft Dia. : 50mm to 200mm
Pressure : Full Vacuum to 50 bar
Temperature : -30 degree C to 200 degree C
Speed: 400 r.p.m.

Technical Details

Versatile Seal Face Materials for Enhanced Performance

The use of Carbon, Silicon Carbide, and Tungsten Carbide in the seal faces enhances durability and chemical compatibility, making the double seal ideal for use with water, oil, and low viscosity fluids. This ensures longevity and consistent performance in hydrogenerators and similar rotating equipment.

Cartridge Mounted Design for Quick Installation

The cartridge-mounted structure allows for straightforward and reliable installation, reducing downtime and minimizing the skill level required for fitting or maintenance. It accommodates custom sizes as per shaft requirements, supporting easy adoption in a variety of applications.

Designed for Demanding Environments

Engineered to operate in temperatures ranging from -20C to +180C and handle pressures up to 16 bar, this double mechanical seal provides robust performance in power plants, large pumps, and other heavy-duty settings. Its bi-directional and precision-finished surfaces ensure minimal leakage and optimal reliability.

FAQ's of Double Seal (Hydrogenerator):

Q: How does the double seal accommodate shaft movement and misalignment in hydrogenerators?

A: The double seal is designed with axial movement capacity, allowing it to adapt to minor shaft movement and misalignment. This flexibility ensures reliable sealing performance even when equipment experiences operational shifts or vibrations.

Q: What are the benefits of using Carbon versus Silicon Carbide or Tungsten Carbide as seal face materials?

A: Carbon offers excellent lubrication properties and is commonly used in less aggressive media. Silicon Carbide and Tungsten Carbide, on the other hand, provide superior wear resistance and are ideal for applications involving abrasive or corrosive fluids, extending seal life under challenging conditions.

Q: When should I select a specific elastomer material like EPDM, NBR, or Viton for my application?

A: The choice of elastomer depends on fluid compatibility and operating temperature. EPDM is best for water and steam, NBR is suited for oils, and Viton is ideal for high-temperature or chemically harsh environments. Selecting the right elastomer ensures optimal seal performance and longevity.

Q: Where can this double seal be applied?

A: This double mechanical seal is suited for hydrogenerators, power plants, and large pumping systems where controlling leakage and fluid retention is critical. Its robust design and adaptability to various fluids make it ideal for industrial environments.

Q: What is the installation process for this cartridge-mounted mechanical seal?

A: Installation involves positioning the seal cartridge on the shaft, aligning it with the equipment, and tightening the fasteners according to the manufacturer's guidelines. Its pre-assembled structure simplifies the process and reduces installation errors.

Q: How does the double seal contribute to safe and efficient operation?

A: By preventing leakage and effectively retaining process fluids within rotating equipment, the double seal enhances operational safety, reduces maintenance frequency, and helps maintain environmental compliance in industrial plants.

Q: What are the advantages of the specified surface finish (Ra 0.8 m) on seal faces?

A: A finer surface finish (Ra 0.8 m) reduces friction and wear, resulting in lower heat generation and improved seal longevity. This ultimately ensures consistent sealing performance and reduces operational costs.

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