What Are the Characteristics of Sealing Materials

▪Ethylene Propylene Diene Monomer (EPDM)

EPDM rubber is stable to most products, so it is widely used in the food industry. Another advantage is that it can be used at a recommended temperature of 140°C (244°F), but there is also a limit. EPDM is not resistant to organic oils, inorganic oils and fats, but it has excellent ozone resistance.

▪Silicone Rubber (VMQ)

The most notable quality characteristic of silicone rubber is that it can withstand temperatures from -50°C (-58°F) to approximately +180°C (356°F) and still retain its elasticity. Chemical stability is still acceptable for most products, however, soda lye and acids as well as hot water and steam may damage silicone rubber, good ozone resistance.

gate valve

▪Nitrile Rubber (NBR)

NBR is a type of rubber that is often used for technical purposes. It is very stable to most hydrocarbons such as oils, greases and fats, as well as dilute alkalis and nitric acid, and it can be used at a maximum recommended temperature of 95°C (203°F). Since NBR is destroyed by ozone, it cannot be exposed to UV light and should be kept out of light.

▪Fluorinated Rubber (FPM)

FPM is often used where other types of rubber are not suitable, especially at high temperatures up to 180°C (356°F), with good chemical stability and resistance to ozone for most products, but should avoid hot water, steam, lye, acid and alcohol.

▪Polytetrafluoroethylene (PTFE)

PTFE has excellent chemical stability and corrosion resistance (it is one of the best corrosion-resistant materials in the world today, except for molten alkali metals, PTFE is hardly corroded by any chemical reagents). For example, when boiled in concentrated sulfuric acid, nitric acid, hydrochloric acid, alcohol, or even in aqua regia, its weight and performance will not change. Working temperature: -25°C to 250°C

High Purity Ball Valve

Stainless Steel Grades

China

EU

USA

USA

UK

Germany

Japan

GB

(China)

EN

(Europa)

AISI

(U.S.A)

ASTM

(U.S.A)

BSI

(U.K)

DIN

(Germany)

JIS

(Japan)

0Cr18Ni9

06Cr19Ni10)

X5CrNi18-10

304

TP304

304 S 15

304 S 16

1.4301

SUS304

00Cr19Ni10

022Cr19Ni10)

X2CrNiI9-11

304L

TP304L

304 S 11

1.4306

SUS304L

0Cr17Ni12Mo2

06Cr17Ni12Mo2)

X5CrNiMo17-2-2

316

TP316

316 S 31

1.4401

SUS316

00Cr17Ni14Mo2

022Cr17Ni12Mo2)

X2CrNiMo17-2-2

316L

TP316L

316 S 11

1.4404

SUS316L


Post time: Mar-14-2023