TREGRAPH - EXPANDED GRAPHITE
	TREGRAPH rings
	TREGRAPH rings have a main application in sealing of the stuffing boxes in valves and pumps. They work at a temperature of the fluid up to 550 , in vacuum - up to 2200 and in inert media - up to 3000 . Resistant to aggressive media - concentrated acids, solutions, hot oils and others with chemical resistance pH 0 - 14. They are produced with a density 1.4 0.3 g/cm3. They are produced with dimensions and technical charactersistics in accordance with the Company standard AVKO-C 1301-1-02. .: Types of TREGRAPH RINGS TREGRAPH ® ring TREGRAPH ® AR ring, reinforced with nickel alloy wire TREGRAPH ® AR ring, reinforced with nickel alloy wire and one-side sheet of AISI 316 TREGRAPH ® AR ring, reinforced with nickel alloy wire and both sides sheets of AISI 316 TREGRAPH ® ring TREGRAPH ® AR ring, one-side sheet of AISI 316 Conic TREGRAPH ® AR ring with nickel alloy wire Conic TREGRAPH ® AR ring, corner reinforced with sheet of AISI 316
	Reinforced stuffing package
	For sealing of stuffing boxes of pumps and armature, working at pressure of 250 - 300 bar and transported fluid temperature of 500 to 600 °, AVKO offers the usage of the reinforced stuffing box set. The set is most suitable for manual valves, where when the valve is started the bigger looses make the sealant wear out easily. The reinforced set is remarkable with its advanced flexibility and elasticity of the sealing rings with preservation of the rest of the physical and chemical qualities, which improve the sealing's reliability and lengthen the exploitation period of the reinforced stuffing box set. In relation with the shaft and the stuffing box's smoothness, AVKO offers two versions of sets: - A set, executed only with TREGRAPH ® AR rings (fig.1) - A set, formed as a combination of TREGRAPH ® AR rings and rings from AVKOPACK 1320/320, preliminary compressed with determinate thickness, which allow enough flexibility during the mounting (fig.2) Conic TREGRAPH® AR ring Covered, reinforced TREGRAPH® AR ring Sheet TREGRAPH® AR ring TREGRAPH® AR ring Conic TREGRAPH® AR ring Covered, reinforced TREGRAPH® AR ring Sheet TREGRAPH® AR ring Compression packing ring AVKOPACK® 1320/320
	TREGRAPH ® materials
	Plates TREGRAPH ® Folio TREGRAPH ® Tapes TREGRAPH ® The above mentioned materials are produced from a pure expanded graphite with a density 0.7 - 1.5 g/cm3. They could be used when working at temperature of the air up to 550 , in vacuum - to 2200 and in an inert media - up to 3000 .
	.: Main classes amterials and technical characteristics
	:: Nuclear class (GTA) Standard - a class with insignificant content of ashes. A standard class for NPS, containing minimum min 99% graphite. It doesnt contain a resin or other binding agents. Reinforced - produced by mechanical moulding or bonding of ordinary graphite plate class (GTA) together with a metal reinforcement. The metal reinforcement could vary from SS316, SS304, carbon steel, tin, zinc, etc. :: Industrial class (GTB) Standard - used for an insulation in the aggressive media. Reinforced - produced by a mechanical moulding or bonding of ordinary graphite plate class (GTB) together with a metal reinforcement. The metal reinforcement could vary from SS316, SS304, carbon steel, tin, zinc, etc. Technical characteristics Plates Tapes Class GTA Class GTB Class GTA Class GTB standard reinforced standard reinforced Carbon content, % (more than) 99 99 98 98 99 98 Suplphur content, ppm (less than) 500 500 1000 1000 500 1000 Chlorine ions, ppm (less than) 50 50 50 50 50 50 Shrinkage, % (more than) 43 43 43 43 43 43 Recovery of shape, % (more than) 18 18 15 15 18 15 Tensile Strength, MPa 4.0 4.0 4.0 4.0 4.0 4.0 Compressive strength, MPa 168 168 168 168 168 168 Loss during tempering, % at 450°C at 600°C 1 20 1 20 1 20 1 20 1 20 1 20    :: Dimensions Sheets Linear dimensions: 700x800 mm; 700x1000 mm; 1000x1000 mm; 1500x1500 mm Thicknesses: 1 mm; 1.5 mm; 2 mm; 2.5 mm; 3 mm; 3.5 mm; 4 mm 0.03 mm Foil (Rolls) / Tapes Width: 5 ÷ 1500 mm Thickness: 0.5 ÷ 1.5 mm 0.03 mm Except smooth, we offer you corrugated tapes and self-adhesive tapes.
	TREGRAPH ® SR tape with preliminary set radius
	The TREGRAPH ® SR tape with preliminary set redius is designed for static sealing of flange joints - flanges for pipelines, armature, machines, appliances and reservoirs. the preliminary set form (radius) of the sealing tape allows easy installation, decreases tear possibility and provides optimum distribution of the contact tension on the sealing surface.