Spiral wound gasket is the best in the compression resilient in all the half-metal seal gasket, which is made by the metal hoop band and different kinds of packing material. We can make its structure density according to the demand of different locking force, and we use the inner and outer circle to control the maximum compact degree. So it can be well suit the rough flange face, especially suit the situation of unbalance load, loose of joint force, temperature and pressure change periodically , concussion and shock. It is used in flange joint of valve, pump, heat exchanger, tank, and handhole. It is widely used in the fields like petrochemical industry, machine, electric power, metallurgy, ship-building, medicine, atomic energe, space navigation. We made spiral wound gasket conform to different standards, for example, asmi, bs, jis, din and several other criterion used in china.
1. Structure
The wound style gasket consists of "v-shape"(or"w-shape")metal tape and nonmetal tape, which are overlapped each other and wound continuously.To fasten the metal tape, both its start point and end point are tack welded.
2.Performance and features
1. Wide range of applicable working condition, high temperature and high pressure resistance, applicable to super low temperature and vacuum condition.Chemical resistant gasket is available under various medium, through change of composition of gasket.
2.Strong stress compensation, stable and reliable sealing performance even under frequent pressure fluctuation condition.
3.Perfect sealing performance.
4.Normal requirement of flange surface finishing which contact with gasket.
5.Easy installation and low pre-tightening stress of gasket.
3.Kinds of gasket
1.A.Wound style gasket consists of four type:basic type, with inner ring, with outer ring, and with inner and outer rings. B.Heat exchanger wound style gasket:basic type and with inner and outer rings.
2. Normally matrial used:
A.Steel tape:08f, 0cr18ni9(304), 0cr18ni9ti, 1cr18ni9ti(321), 0cr17ni12, m02(316), 00cr17ni14m02(316l).
B.(cold roll)steel plate for inner and outer ring:outer ring:mild steel, 0cr13 and 0cr18ni9
Inner ring:same as steel tape, special order is a available through negotiation.
C.Nonmetal tape:flexible graphite, special made asbestos, teflon and non-asbestos paper.
4.Scope of application
1. Working temperature:-196íµ -700íµ(not higher than 600íµ in oxidic medium)
2.Working pressure:ín25mpa
3.Gasket coefficient:m=2.5-4
4.Min.Pre-tightening specific pressure:y-68mpa
5.Max.Machinable size:-2800mm
Die formed graphite packing ring is made of pure flexible graphite , or graphite with nikle/ss316/brass wire reinforced. Performance and features
Perfect self lubricant performance.
High elasticity coefficiency.
Scope of application
Working temperature:~200~400íµ(200~800íµ under non-oxidation atmosphere)
Working pressure:ín35mpa
Density:1.4 ~ 1.6 g/cm3
Max.Machinable size:5~850mm
Since its establishment in 1993, Dongsuh Industry Co., Ltd. has specialized in manufacturing SEALING products for power generation facilities in Korea. In particular, as we manufacture SEALING products, which are mostly used in critical power generation equipment systems, we value quality stability and develop excellent technical skills.
The reliability of quality has been verified by acquiring 'Q', the highest level of safety of qualified suppliers, including ISO 9001 and 14001, and the five leading power companies under the Korea Electric Power Corp. have various quality certificates. We are also conducting R&D to continuously improve quality, improve working environment, and develop new products.
Based on these efforts, we have won awards for excellent suppliers to major power generation companies in Korea and expanded our production lines by steadily increasing sales. We are now trying to move beyond the domestic market to the global market.
SPIRAL WOUND GASKETOutstanding capability for high temperature and high pressure
Automatic flexibility and recovery from the change of temperature, pressure, vibration and working conditionsEfficient production for any type of dimensions such as round or oval type, etc.Outstanding sealing capability as it is produced according to the pressure of unbalanced flange.
Hoop and Filler materials can be selected according to special operating conditions.
GRAPHITE MOLD PACKING
â?¢ Graphite Tape Packing is the packing that compressed and molded in a certain dimension for easy installation.
â?¢ The graphite's self-lubrication capability and low coefficient of friction allow to use in a wide range without giving damage on the reciprocating and rotary shaft.
â?¢ If you want to disassemble only gland without disassembling pump and valve, you can just cut it and deliver.
â?¢ You can get better sealing effects if you use with ALS910C, ALS900G and ALS955W depending on the use purpose.
RING JOINT GASKET
Ring joint gasket is a type of pressure energized gasket used on pipe flanges, pressure vessels, Valve bonnets handling, high pressure steam, gas, hot oil, solvent vapor at high temperature.
DONGSUHs experienced technology offers many different types so that customers may select the most suitable one in accordance with operating conditions.
MECHANICAL PACKING (VARIOUS MODELS DEPENDING ON CONDITON)
PTFE V-PACKING
SPRING ENERGIZED SEAL
