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PTFE Envelope Gasket

PTFE Envelope Gasket
PTFE Envelope Gasket
Product Code : 006
Product Description

Owing to our expertise in this domain, we are engaged in manufacturing, exporting and supplying a supreme quality PTFE Envelope Gasket. Manufactured under the surveillance of our ingenious professionals by utilizing the finest quality rubber according to the set industry standards, this gasket is made available in various dimensions. Offered gasket is widely used in assembling the parts of various machines in proper and uniform manner. We provide this PTFE Envelope Gasket at nominal rate to the customers within the promised time span.

Features:

  • Flawless finish

  • Thermal resistance

  • Easy installation

  • Durability

We are renowned manufacturer and supplier of PTFE Envelop Gaskets, which are split and machined from the outside diameter wall of 1/16 inches. The gasket is supplied without filler and with the square or milled cut.

Basic Details of PTFE Envelop Gaskets:

  • Same as the full face w/o the bolt holes
  • Has a required thickness & inside and outside dimension

Property Comparison of Various Fluoropolymers
 

Property   ASTM test  method/test condition      PTFE        PFA      FEP       ETFE      CTFE


Physical Properties

Specific gravity D792
D570/24 hrs 1/2"t
2.13~2.22 2.12~2.17 2.12~2.17 1.70~1.76 2.10~2.18
Water absorption (%)   <0.00 <0.03 <0.01 <0.1 <0.00
Mold shrinkage (cm/cm)   0.02 ~0.05 0.04 0.03~0.06 0.03~0.04 0.015~0.020
Contact angle (degree) Angle to level 110 115 115 96 84

Mechanical Properties
Tensile strength
(kgf/cm2)
D638/23oC
140~350 280~315 190~220 410~470 320~420
Elongation (%) D638/2oÃâہ¡ÃƒÆ’‚°C 200~400 280~300 250~330 420~440 80~250
Compression strength (kgf/cm2) D695/1% deformation, 25oC 50~60 50~60 50~60 109 90~120
Tensile modulus
(kgf/cm2)
D638/23oC 4,000 - 3,500 5,000~8,000 10,500~21,000
Hexural Modulus
(kgf/cm2)
D790/23oC 5,000~6,000 6,600~7,000 5,500~6,500 9,000~14,000 13,000~18,000
Impact strength
(ft-lb/ln)
D256/23oC lzod 3.0 - No breakdown No breakdown 2.5~2.7
Hardness (Shore) Durometer D50~D65 D60 D55 D75 D90
Deformation under load (%) D621/100oC
70 kfg/cm2, 
24 hrs
D621/25oC
140 kgf/cm2,
24 hrs

5.0

7.0

2.4

2.7

5.0

3.0

5.4

2.3

2.6

0.2

Static friction coefficient Coated steel surface 0.20 0.50 0.50 0.60 0.80

Typical Filler Properties

Filler
Physical Form
Amount (% Weight)
Effect of Filler

Glass Fibers
Milled Fibers
up to 40%
(also in combination with graphite, MoS2 and carbon)
  • increased compressive strength
  • increased rigidity
  • increased wear resistance
  • reduced cold flow
  • resistant to organic solvent

Carbon

Carbon Fibers

Powder

Milled Fibers

up to 25%
(also in combination with graphite, bronze, and glass)
 
up to 30%
  • increased comprehensive strength
  • increased hardness
  • increased wear resistance
  • improved thermal conductivity
  • good dry running properties
  • electrically conductive at higher filler contents
  • resistant to hydrofluoric acid
Graphite
Powder
up to 25%
(also in combination with glass, bronze, and carbon)
  • improved sliding properties
  • reduced coefficient of friction
  • improved thermal conductivity
Bronze
Powder
up to 60%
(also in combination with carbon, graphite, and MoS2))
  • increased comprehensive strength
  • increased hardness
  • increased wear resistance
  • improved thermal conductivity
  • reduced cold flow
Molybdenum disulphide (MoS2)
Powder
up to 5%
(also in combination with glass and bronze)
  • improved sliding properties
  • increased wear resistance
Stainless Steel
Powder
up to 60%
  • improved thermal conductivity
  • reduced cold flow
  • resistant to most chemicals
Pigments
Powder
up to 2%
  • for coloring
    (identification)

The detailed sizes of the PTFE Envelopes are mentioned below:

ASA 150 ASA 150 ASA 150 ASA 300 ASA 300 ASA 300
 Sr.No. Size: NB   Unit Price INR  Sr.No.  Size: NB   Unit Price INR
 01   1/2"  15.00    01   1/2"  25.00 
 02   3/4"  23.00    02   3/4"  33.00 
 03  1"    27.00    03    1" 40.00 
 04 1 1/2"  45.00   04  1 1/2"   63.00 
 05 2"   65.00   05  2"   80.00 
06  2 1/2"  83.00   06  2 1/2"  105.00 
 07 3"  90.00   07  3"  135.00 
 08 4"  145.00   08  4"  195.00
 09 5"  165.00   09  5"   255.00 
 10  6"   180.00   10 6"   330.00 
11  8"  270.00   11  8"   450.00 
12  10"  375.00   12  10"    525.00  
13  12"  780.00    13    12"   1005.00 
14  14"  990.00   14   14"   1500.00 
15   16"   1260.00    15  16"  1650.00  
16  18"  1350.00   16  18"   2025.00 
17  20"  1500.00   17    20"    2175.00 
18   22"   1650.00   18   22"   2850.00 
19  24"  1890.00    19     24"    3600.00 
           
           


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