LCF40/250I, LCF40/350I, LCF40/400I, LCF50/350N1I, LCF50/400I, LCF65/350I, LCF65/400I, LCF80/400I, LCF100/320I, LCF100/350I, LCF125/405I, LCF125/350I, LCF150/300I, LCF150/350I, LCF200/300I, LCF200/350I, LCF200/410I, LCF250/300I, LCF250/350I, LCF250/430I, LCF300/635I – Mechanical Seals

Mechanical seals are categorized into single-end face cartridge-type and double-end face cartridge-type.

Single-ended modular: Only 1 pair of sealed mating surfaces, Pre-assembled by the sealing manufacturer at the factory, requiring no customer adjustments—simply install as is. Easy to set up and straightforward to use. Cooling water pressure is controlled at 0.05-0.1MPa Between

External Single-Seal Face Seal Image

Single-end face seals are further divided into two types: internally mounted (where the entire seal assembly, including the large flange, is fully submerged in the slurry; this type is assembled starting from the impeller end toward the motor end) and externally mounted (where only a small portion of the seal assembly is immersed in the slurry; this type is assembled starting from the motor end toward the impeller end).

Interior single-face seal image

Dual-end-face modular design: Consisting of 2 pairs of sealed mating surfaces, Pre-assembled by the sealing manufacturer at the factory, requiring no customer adjustments—simply install as is. Easy to set up and straightforward to use. Cooling water pressure is controlled at 0.05-0.1MPa Between

External Double-End Face Seal Image          

Double mechanical seals typically refer to externally mounted double seals, which are a derivative of the single-end external design (by replacing the water-side skeleton oil seal in the single seal with a tandem set of mechanical seals), aiming to extend service life.

Structural features:

Single-end (double-end) cartridge-type mechanical seal. Easy to install and simple to use. Balanced design with optional rotation direction.

Internal working length is short. The stationary ring features multi-spring external compensation that does not come into contact with the medium.

Applicable medium:

A medium with a high content of impurities such as gypsum and lime slurry.

Work parameters:

Fixed substance content: ≤30%

Warm Temperature: ≤280°C

Press Force: ≤2.5 MPa

Axis Diameter: ≤200mm

Material parameters:
Main material: 316L or 2205, 2507, 1.4529
Sealing ring material: SSiC or SiC
Rubber materials: Fluororubber or perfluoroether rubber

Main applications:

This type of mechanical seal is primarily used in flue gas desulfurization systems for coal-fired power plants, and is suitable for absorption tower slurry circulation pumps, gypsum slurry pumps, limestone slurry pumps, and gypsum discharge pumps.

Common pump numbers are as follows:

LCF40/250I LCF40/350I LCF40/400I LCF40/450I LCF50/350N2 LCF50/400I

LCF50/460I LCF65/310I LCF65/315I LCF65/350I LCF65/400I LCF80/400I

LCF80/450I LCF100/300 LCF100/320I LCF100/350I LCF100/420I LCF125/405I

LCF150/300I LCF150/350I LCF200/300I LCF100/500T LCF150/400I LCF200/410I

LCF250/430I LCF250/430I LC300/500I LC300/530I LC300/400I LC300/635I

LC300/630I LC350/500I LC350/560I LC400/500I LC400/540I LC450/635I

LC500/630I LC550/700I LC550/710I LC550/750I LC600/825I LC700/900I

LC700/898I LC800/1000I LC900/1150I LC500/630II LC550/700II LC550/710II

LC550/750II LC600/825II LC700/900II LC700/898II LC800/1000II LC900/1150II

Sealed model:

HTM-30S251Z HTM-30S351X HTM-30S220Z HTM-30S220Q

HTM-30D251ZZ HTM-30D351X

HTM-40S251Z HTM-40S351X HTM-40S220Z HTM-40S220Q

HTM-40D251ZZ HTM-40D351XX

HTM-55S251Z HTM-55S351X HTM-55S220Z HTM-55S220Q

HTM-55D251ZZ HTM-55D351XX

HTM-60S251Z HTM-60S351X HTM-60S220Z HTM-60S220Q

HTM-60D251ZZ HTM-60D351XX

HTM-80S251Z HTM-80S351X HTM-80S220Z HTM-80S220Q

HTM-80D251ZZ HTM-80D351XX

HTM-85S251Z HTM-85S351X HTM-85S220Z HTM-85S220Q

HTM-85D251ZZ HTM-85D351XX

LB-LK7-120S LB-LK7-120D LB-LK6-115S LB-LK6-115D

HTM-30S HTM-40S HTM-55S HTM-60S HTM-80S

HTM-30D HTM-40D HTM-55D HTM-60D HTM-80D

HR3-125 HR3-142 HR3-158 HR3-175 HR3-198

HR325/230 HR325/210 HR325/190 HR325/170

HRM-125D3 HRM-142D3 HRM-158D3 HRM-175D3 HRM-198D3

HRM-125S3 HRM-142S3 HRM-158S3 HRM-175S3 HRM-198S3

HMR3C-125 HMR3C-142 HMR3C-158 HMR3C-175 HMR3C-198

Installation Use Requirements :

1. The radial runout of the equipment shaft should not exceed 0.04 mm, with axial runout not exceeding 0.1 mm;
2. The sealing cavity of the equipment should be kept clean during installation, and sealing components must be thoroughly cleaned. Ensure that the sealing faces remain intact to prevent contaminants and dust from entering the sealing area.
3. During installation, avoid any impact or hammering to prevent damaging the mechanical seal through friction or breakage, which could lead to sealing failure.
4. During installation, apply a layer of clean machine oil to the surfaces that will come into contact with the seal, ensuring smooth installation.
5. When installing the stationary ring gland, tighten the screws evenly to ensure the stationary ring face is perpendicular to the shaft centerline.
6. After installation, gently push the moving ring by hand to ensure it moves freely along the shaft while maintaining some elasticity.
7. After installation, manually rotate the shaft—there should be no sensation of unevenness or heaviness.
8. Before starting operation, the equipment must be fully charged with the medium to prevent dry friction, which could lead to seal failure.