0.8～3.2×1524×1524mm
0.8～3.2×1500×1500mm
0.8～3.2×1000×1000mm

Applications

Widely used in petroleum, chemical, electric power, gas, nuclear energy, aerospace, textile, metallurgy, shipbuilding, machinery and other industries in industrial equipments, flanges, valves, reactors, pumps, pressure vessels, heat exchangers, condensers, generators, air Sealing of compressors, exhaust pipes, refrigerators, etc.

Operating Environment

Working temperature：-200°C～600°C
Working pressure：≤11MPa

Technical Parameters

Main Products

The post Graphite composite sheet appeared first on Binzhou Double Peaks Graphite Sealing Materials.

	◆ Coupling ring series: It is made by die-cutting punching of various types of steel plates. Mainly used in automotive exhaust pipe systems.
	◆Flange Series: It is made by die-cutting punching of various types of steel plates. Mainly used in the connection of heavy-duty vehicle exhaust pipe system.
	◆Automotive Punching Gasket Series: It is punched and molded by various metal reinforced graphite composite plates. The main products are engine cylinder gasket and exhaust pipe gasket.

The post Auto Parts appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Nuclear Grade Gasket Applications

The post Nuclear Grade Gasket Classification appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Thickness: 1-80 mm
Specification: 500 ~ 2000mm

Usage

According to the technical specifications of the product, it can be used for various sealing cushion rubber rings, rubber pads, and rubber pads.

Technical Parameters

Note: The above values ​​are only reference parameters for selected materials. For specific applications please contact our engineers.

The post Rubber material appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Thickness (mm): 0.5, 1.0, 1.5, 2.0, 3.0, 4.0, 5.0, 6.0
Specifications (mm): 1500 x 1500

Usage

The excellent compressibility makes it very adaptable to pressure sensitive connections such as ceramic, glass or plastic lining pipes or non-uniform flanges. Materials with excellent media resistance and blowout safety are excellent even in cyclic load applications.

Technical Parameters

Thickness 2.0mm test value

Note: The above values ​​are only reference parameters for selected materials. For specific applications please contact our engineers.

The post PTFE Material appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Mainly used for the sealing of valves, pumps, expansion joints, etc. in petroleum, chemical, thermoelectric, nuclear power and general industrial applications. Used for stem seals such as low leakage rate shut-off valves, isolation valves, and regulating valves.

Applications

Working temperature: -196°C～600°C
Working pressure: ≤43.1MPa

Transportation and Storage

Prevent rain and moisture during transportation.
Should be stored in a clean, dry warehouse.

Technical Parameters

Installation Instructions

Place the packing ring in the stuffing box, preload with gland bolts, compress the entire packing assembly by 15% to 20%, and record the torque of the gland nut. Then turn the valve stem for 5 switching cycles. After each rotation, tighten the gland nut to the previously recorded torque value.

Main products

Package Ring Use Maintenance and Operation Maintenance

Causes of sealing failure

Volume loss and brittleness during use of woven fillers
Damaged packing ring during installation
Lack of cover load
Poor thermal shock resistance of filler
Filler wear, slack, volume loss results in reduced lid load
Packing ring size deviation is too large
The depth of the stuffing box design is irrational
Shaft (bar) surface is rough
Axis (bar) and stuffing box are different
Spindle (rod) erosion or filler wear in operation

Use maintenance

Correct design of stuffing box size
Carefully install the packing ring
Packing box depth meets design specifications
Shaft (bar) surface should be smooth
Proper gland loading and load adjustment capability
There are measures to compensate for the wear of the packing, such as gland nuts and disc spring washers
Shaft (rod) has good support
Packing and stuffing box have the correct fit clearance
Correctly install and compress the packing before running.

Operation and maintenance

1. After the seal packing is assembled, it can be put into operation. Before the official start of the car, you should start the test run slowly with human power. In operation, if the torque is too large, it may be caused by the tightness of the packing gland. It may be appropriate to loosen the gland bolt and adjust it until the frictional resistance becomes smaller without leakage.
When starting operation, if the friction torque is large and the temperature of the stuffing box rises, the preload may be too great. Measures must be taken to adjust and, where circumstances permit, appropriate leakages should be controlled. For most non-harmful media centrifugal pumps, a small amount of droplet leakage should be maintained in normal conditions to provide cooling and lubrication.
2, after the official drive, we must adhere to observe on time, pay attention to whether the leakage and the temperature of the stuffing box meet the requirements, if any abnormalities, to immediately adjust. If the leakage is greater than the allowable value, the gland can be tightened.
3, storage of filler
1) The sealed packing should be stored in a normal temperature, ventilated place; prevent direct sunlight, in order to avoid aging deterioration. It must not be stored in the vicinity of corrosive materials such as acids and alkalis, nor should it be stored in high-temperature radiation or in low-temperature and humid environments.
2) During handling and inventory, care should be taken to prevent sand, dust and foreign matter from sticking to the packing. Once the debris is adhered, it must be completely removed to avoid damage to the shaft surface after assembly and affect the sealing effect.
3) For the sealed packing used in nuclear power plants, in addition to the above points, care should be taken to avoid contact with substances containing chloride ions.

Pre-tightening force estimation method for bolts

M = 0.785(D2-d2) × d_B × F/n
dB – nominal diameter of bolt (mm)
F – bolt load (MPa) braided packing by 38MPa, graphite packing ring by 26MPa, or by 1.5 times the medium pressure
N – number of bolts

The post Graphite packing ring appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Thickness: 0.5, 0.6, 0.7, 0.8, 1.0, 1.2, 1.4, 1.5, 1.6, 2.0, 3.0mm, etc.
Specifications: 1500×1000mm, 1500×1500mm

Usage

Widely used in petroleum, chemical, electric power, automotive, marine and food industries.

Technical Parameters

The post Non-metallic material appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Nominal diameter: 1/2′′～28

Technical Parameters

Applications

Working temperature: -200°C~600°C
Working pressure: ≤50MPa

Usage

Applicable to nuclear power supply system 1,2,3 safety level process, instrumentation line flange, body seal, and vaporizer primary and secondary sides and regulator manhole or hand hole seal.

Gasket Structure

The graphite gasket consists of a metal inner ring, a graphite ring, and a metal outer ring. The middle of the gasket is a high-purity expanded graphite ring.

Structure Diagram

Gasket Size

The graphite gaskets for flange seals match the flange sizes of ASME B16.5 and ASME B16.36. For non-standard flanges and the implementation of other standard flanges, the gaskets also determine the gasket size according to the flange requirements.
The gasket size d1 is matched with the inner hole of the flange. Between d2 and d3 is the effective sealing surface of the gasket. d4 should be smaller than the diameter of the center circle of the flange bolt hole minus the diameter of the bolt hole.

The values ​​in brackets are 1500 lbs and 2500 lbs.

Dimensional Deviation

Diameter limit deviation (unit: mm)

Thickness limit deviation (unit: mm)

Metal ring flatness: 0.1mm (DN≤200); 0.2mm (200<DN≤600)

Appearance quality

No defects, such as scratches, voids, irregularities, and rust spots, which affect the sealing performance, are allowed on the upper and lower surfaces of the graphite ring of the gasket.
The surface of the inner ring and the outer ring shall have no defects such as burrs, uneven or rusty spots; the distances between the upper and lower sealing surfaces of the graphite ring of the gasket and the upper and lower surfaces of the ring shall be equal; the graphite ring shall be fixed between the inner ring and the outer ring; Allow loosening.

Gasket Advantage

The post Nuclear grade graphite gasket appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Widely used in static sealing parts of equipment, process piping, etc. in many industries such as petroleum, chemical industry, electric power, gas, nuclear energy, aerospace, automobile, shipbuilding and food.

Main products

The post Non-metallic gasket appeared first on Binzhou Double Peaks Graphite Sealing Materials.

Applicable to the sealing of pipes, containers, flanges, valves, etc. under high temperature and high pressure conditions such as chemical, nuclear, and electrical power.

Main products

Main Products	Item	Name	Description		Application
	DP3410	Metal flat mat	Apply nominal pressure	25.4 MPa	Usually applied to high pressure steam, gas, solvent and other devices, such as high pressure vessels, high pressure valves, etc.
	DP3420	corrugated spacer	Working pressure	25.4 MPa	Used for sealing parts of bonnets, globe valves, check valves, etc.
	DP3430/40	toothed pad/corrugated pad	Apply nominal pressure	25.4 MPa	Mainly used for high-temperature, high-pressure pipe flange sealing, sealing parts of valve covers such as gate valves, globe valves, check valves, etc.
	DP3450/60	Triangle/Wedge (lens)	Apply nominal pressure	32 MPa	Usually applied to high pressure steam, gas, solvent and other devices, such as high pressure vessels, high pressure valves, etc.
	DP3470/80	Octagonal/Oval Pads	Working pressure	25.4 MPa	Usually applied to high pressure steam, gas, solvent and other devices, such as high pressure vessels, high pressure valves, etc.

gasket material and applicable temperature

The post Metal gasket appeared first on Binzhou Double Peaks Graphite Sealing Materials.