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IHF Chemical Pump Seal - Corrosion Resistant Mechanical Seal for High Temperature and Double-face Balanced Applications

Product Details

Place of Origin: Zhejiang, China

Brand Name: JG

Certification: FDA certificate

Model Number: IHF

Payment & Shipping Terms

Minimum Order Quantity: 1pcs

Packaging Details: white box

Delivery Time: 3~10DAYS

Payment Terms: T/T,Western Union,MoneyGram

Supply Ability: 1000PCS

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Specifications

Description

Specifications

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                                                                                                                                                                                                                                                                                                                                                                                                      Corrosion Resistant Chemical Pump Seal, High Temperature Mechanical Seal, Double-face Balanced IHF Seal
                                                  

Product Name:	IHF Chemical Pump Seal	Pressure:	1 - 1.6Mpa
Application:	Chemical Pump Seal	Temperature:	-40°C To +200°C
Speeds:	≤3000 Rpm	Metal Parts:	SS304 , SS316

Product Name:	IHF Chemical Pump Seal
Pressure:	1 - 1.6Mpa
Application:	Chemical Pump Seal
Temperature:	-40°C To +200°C
Speeds:	≤3000 Rpm
Metal Parts:	SS304 , SS316

Description

IHF Chemical Pump Seal - Corrosion Resistant Mechanical Seal for High Temperature and Double-face Balanced Applications

IHF Chemical Pump Seal

The IHF chemical pump is a fluoroplastic-lined centrifugal pump designed for transferring highly corrosive and oxidizing media. The matching mechanical seal must meet three core requirements: chemical corrosion resistance, resistance to medium erosion, and compatibility with the fluoroplastic pump structure. Below is comprehensive technical information about this seal:

1. Compatible Types & Core Structure

Based on the hazard level of the conveyed medium, IHF chemical pumps are equipped with two mainstream seal types:

Seal Type

Applicable Working Conditions

Structural Features

Single-face unbalanced mechanical seal

Conventional corrosive media (e.g., dilute sulfuric acid, sodium hydroxide solution), non-toxic, low-volatility media

1. Simple structure, low cost

2. Torque transmission via multi-spring or single-spring

3. Secondary seal directly fits the fluoroplastic pump shaft sleeve, no risk of shaft sleeve wear

4. No external buffer fluid system required, easy to install and maintain

Double-face balanced mechanical seal

Highly toxic, volatile, flammable/explosive media (e.g., concentrated nitric acid, organic solvents)

1. Double-seal-face design, with buffer/isolation fluid filled in the intermediate cavity

2. Balanced structure reduces seal face specific pressure, extending service life

3. Compatible with API-standard flushing schemes, enabling zero leakage

4. Requires a matching buffer fluid circulation system to enhance safety

General Structural Advantages

The seal chamber seamlessly adapts to the fluoroplastic lining of the IHF pump; no pump body modification is needed during installation
The shaft sleeve uses 316L stainless steel + PTFE coating to resist medium corrosion and shaft wear
The stationary seat adopts a split design to avoid damaging the pump body’s fluoroplastic lining during installation

2. Key Technical Performance Parameters

Parameter Category	Single-face Seal	Double-face Seal
Applicable Pressure Range	≤1.0 MPa (10 bar)	≤1.6 MPa (16 bar)
Applicable Temperature Range	-20°C ~ 200°C (depending on secondary seal material)	-40°C ~ 250°C (when paired with metal bellows structure)
Applicable Rotational Speed	≤3000 rpm	≤3000 rpm
Shaft Diameter Compatibility Range	20 mm ~ 100 mm (covers all IHF100~IHF200 pump models)	25 mm ~ 120 mm
Allowable Shaft Runout	≤0.05 mm	≤0.03 mm
Leakage Standard	≤5 drops/min (in clean water conditions)	Zero leakage (when buffer fluid circulation is normal)

3. Core Material Selection Scheme (Classified by Medium Characteristics)

Material selection for IHF pump seals directly determines seal life; it should be tailored to the medium’s corrosiveness, temperature, and solid content:

Conveyed Medium Type	Seal Face Material Combination	Metal Component Material	Secondary Seal Material	Expected Service Life
Dilute acids/alkalis/salt solutions (e.g., 5% sulfuric acid, NaOH)	Silicon Carbide (SiC) / Impregnated Graphite	316L Stainless Steel	Fluororubber (FKM)	8000~12000 h
Concentrated acids/strong oxidizers (e.g., concentrated nitric acid, hydrogen peroxide)	Silicon Carbide (SiC) / Silicon Carbide (SiC)	Hastelloy C276	Perfluoroelastomer (FFKM)	6000~10000 h
Organic solvents	Tungsten Carbide (WC) / Silicon Carbide (SiC)	316L Stainless Steel	Polytetrafluoroethylene (PTFE)	10000~15000 h
Media containing solid particles (e.g., acid/alkali solutions with sediment)	Tungsten Carbide (WC) / Tungsten Carbide (WC)	316L Stainless Steel + Ceramic Coating	Fluororubber (FKM)	3000~5000 h

4. Key Installation & Maintenance Points

1. Installation Precautions (Adapted to IHF Fluoroplastic Pump Characteristics)

Do not strike seal components with metal tools to avoid damaging the pump body’s fluoroplastic lining
Strictly control the seal compression to 3~5 mm; excessive compression causes seal face overheating and wear, while insufficient compression leads to leakage
Clean the seal chamber and shaft sleeve surface before installation (no impurities or burrs) to avoid scratching the seal face
The fit tolerance between the shaft sleeve and pump shaft should be H7/h6 to ensure coaxiality and reduce seal eccentric wear

2. Daily Maintenance Points

Regularly check leakage; shut down for maintenance if leakage exceeds 10 drops/min
For particle-containing media, equip a flushing pipeline (inject clean water) to prevent particles from entering the seal face
Replace secondary seals (FKM/PTFE) every 6 months to avoid aging and failure
When storing the pump for long periods, drain the medium, run the pump with clean water for 5 minutes to clean the seal face, then seal it for storage

5. Common Failures & Solutions

Failure Phenomenon

Core Cause

Targeted Solution

Seal face overheating/smoking

1. Excessive seal compression

2. No flushing fluid, dry friction on seal face

3. Excessive shaft runout

1. Adjust compression to the standard range

2. Activate the flushing pipeline and inject clean medium

3. Overhaul the pump shaft and bearings to correct coaxiality

Excessive medium leakage

1. Aged/deformed secondary seal

2. Scratched/worn seal face

3. Spring failure

1. Replace with new secondary seals

2. Lap or replace the seal face

3. Replace with springs of the same specification

Abnormal noise during seal operation

1. Spring detachment/jamming

2. Loose shaft sleeve

3. Impurities entering the seal chamber

1. Disassemble the seal and reinstall the spring

2. Tighten the shaft sleeve lock nut

3. Clean the seal chamber and check for flushing pipeline blockages

6. Core Selection Principles

For highly toxic, volatile media, prioritize double-face balanced seals with a matching buffer fluid system
For particle-containing media, prioritize hard alloy seal faces + flushing schemes
For high-temperature media (>180°C), prioritize metal bellows structures instead of rubber secondary seals

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