The spiral wound gasket is a semi-metallic gasket specially designed for high temperature and high pressure applications. Metallic V-section strips combined with non-metallic materials with compliance and sealing characteristics are spirally wound, the beginning and end of the winding being reinforced with several turns of metallic tape and then spot welded for security.   This is s highly resilient gasket with heat- and pressure -resistant characteristics and has outstanding heat cycle efficiency. Various types of fillers to meet high and low temperatures, and different fluids make these gaskets suitable for nuclear, thermal, refinery, and petrochemical applications. These gaskets are made to match the pressure rating of flange and also demonstrate exceptional sealing characteristics for high and low pressures flange applications.
     
 

Special features
1. The gasket to flange design rating permits easy product selection and handling.
2. The gasket can be used for a wide pressure range.
3.

 

Stable sealing characteristics of high integrity can be maintained for an extended period of time in the absence of leakage due to permeability.
4. The gasket seating stress is balanced across its surface to alleviate problems from uneven tightening, insufficient or over tightening of the gasket.
5. Freedom from the creation of excessive stress in the gasket ensures longer service life. Stable sealing from the gasket is ensured even under stringent operating conditions involving heat cycling, vibration and bending moments.
6. The tightening criterion for the gasket is to see if it is compressed to the thickness of the outer ring. Thus all personal variation in tightening force can be eliminated, giving easy installation.
Basic Gasket
 Pillar No. 2200, 2300, 2600

In the basic gasket shape, the metallic hoop and filler are wound alternately and, being of narrow width, can be safely used for high pressure service.
With Inner Ring
 Pillar No. 2201, 2301, 2601

These are basic shape gaskets provided with various types of 3.0 or 3.2 mm thick metallic rings of different types around their inner circumference. With this type of gasket, there is no deformation of the rose shape under excessive compression, and it further prevents any blockage of the fluid flow or erosion of the flange corners by reducing the variation between the inner diameter of the pipe and the inner diameter of the gasket.
With Outer Ring
 Pillar No. 2202, 2302, 2602

These are basic shape gaskets provided with various types of metal rings around their outer circumference to prevent horizontal warping of the gaskets under compression, and are used for flat face and raised face flanges. Gasket fitting is easy with the external face of the outer rings designed to register with the inner faces of the flange tightening bolts.
With Inner & Outer Ring
 Pillar No. 2203, 2303, 2603

These are basic shape gaskets provided with various types of metallic rings around their inner and outer circumferences. The inner prevents deformation of the gasket's rose shape, whereas the outer ring provides for easy registration fitting and upgrading of the pressure-resisting capacity of the joint.
With Branch Ring
 Pillar No. 2200 Y, 2300 Y, 2600 Y

These are spiral wound gaskets with a hollow metal O-ring or a branched metal jacketed gasket around the inner circumference. They can be safely used where temperature changes are rigorous or temperatures and pressure are exceedingly high.

 

 

 

 

 

 

 

 
In these gaskets, an asbestos joint sheet or asbestos board is sandwiched between two PILAFLON sheets. The combination of chemical-resistance, the outstanding sealing of PILAFLON and the elasticity of the stuffed material makes for top class performance. In comparison with simple PILAFLON gaskets, the overall thickness of the PILAFLON layer is very small, having little stress relaxation at high loads.
PILAFLON is the tradename of Pillar's products of polytetrafluoroethylene resins

Inner material Code J1 ----- Asbestos Joint Sheet
J4 ----- Asbestos Joint Sheet + Stainless Foil
AF ----- Non-Asbestos Joint Sheet
FH ----- Non-Asbestos Sheet + Stainless Foil

Example

Style No. 4430-J1 ----- Inner material : Asbestos Sheet
Style No. 4430-AF ----- Inner material : Non-Asbestos

 

Pillar Compressed Jointing Sheet Style 5000 is a quality packing fabricated from selected long fiber chrysotile asbestos with synthetic rubber and heat-resistant compounds, and it's used for marine, heavy industry, oil refinery chemical industry and general maintenance.
TYPICAL ORIGINAL PROPERTIES
Colour
Density
Compressibility
Recovery
Strength
Thick. Increase		 Thick. Increase
1.9 gr/cm3
12%±5% (350 kgf/cm2)
50% (350 kgf/cm2)
2.8 kg/mm2
ASTM No. 3 Oil 4%
(150℃/5 hr.) ASTM Fuel Oil 10.1% (21.1℃-29.4℃/24 hr.)
SPECIFICATION COMPLIANCE
ASTM F104-71 Grade P-1141A
JIS R-3453 Class Ⅲ
JPI-7S-4-70 Class B
FEATURES Compressive recovery characteristics
GENERAL SERVICE
EXCELLENT SEALING
CHEMICAL RESISTANCE
EASY CUTTING
SERVICE
Temperature up to 500℃ (932℉)
Superheated steam, Heated water, Alkali solutions,
Oils,
Air, Gases and Chemicals
STANDARD SIZE & WEIGHT
Thick. : Inch 1/64, 1/32, 1/24, 1/16, 3/32, 1/8
: mm 0.5 0.8 1.0 1.5 2.0 3.0
Size : 50″x 50″, 50″x 100″, 50″x 150″
Weight : Approx. 10 Lbs for 1/16″x 50″x 50″

 

 
Pillar No. 56KV

A general purpose jointing with excellent chemical suitability, resistance to creep and good torque retention, suitable for solvents, gases, hydrocarbons, water and acids. This brand is widely used in the Oil refinery, Petrochemical, Thermal power, Public Utilities and other associated sectors.

Mfr. : DONIT TENSITY, Solvenia

PHYSICAL PROPERTIES & PERFORMANCE (Values relate to 1.5mm thickness)

Pillar No. 6630
6631
6633

This is the highest grade sheet and Gasket possessing the superior Heat-resistant, Chemical- resistant, Pliable, Elastic and Impermeable character- istics of Graphite.


Special features

1. Top-class sealing capacity. Graphite is highly pliable, making matching contact with the whole of the flange surface, to give excellent sealing capabilities under low seating stress.

2. Not influenced by heating. Since Graphite does not contain any additives and adhesives in its composition, its performance is not affected by heating.

3. Strong chemical resistance. Graphite is made of pure graphite and maintains its chemical-resistant properties.

4. Can be used for cryogenic applications. The pure graphite in Graphite is very little affected by low temperatures and can be used in cryogenic equipment.

Physical Properties and Performance of Graphite

Sheet Section and Dimension

Suggested Usage Specifications

 
Pillar No. 5001 / 5002

General purpose Rubber sheet gasket possessing the elasticity, and Pressure / Heat / Chemical-Resistant characteristics of Rubber.

This useful simplex Rubber or Cloth-impregnated Rubber material is made from Reinforced natural Rubber or Synthetic Rubber mixed with such fillers as vulcanizing material.