Diaphragm Seals

Diaphragm Seals

Hardness:50~90 Shore A
Temperature:-190~250℃
Material:PTFE
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Description
Technical Parameters

Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of diaphragm seals in China, also supports customized service. Please feel free to buy high quality diaphragm seals for sale here from our factory.

 

Products Description

 

PTFE
Property Unit Test Method Test Parameter Value
Hardness Shore D ASTM D2240 (Shore D - 15 sec) 60
Specific gravity g/cm3 ASTM D792   2.18
Tensile strength MPa ASTM D638 Microtensile
specimen of ASTM
D1708, speed of
testing 0.8mm/s
26.5
Ultimate elongation % ASTM D638 Microtensile
specimen of ASTM
D1708, speed of
testing 0.8mm/s
300
Modulus of Elasticity MPa ASTM D638   280
Coefficient of thermal
expansion from 25 to 100°C
°C-1 ASTM E 831   16x10-5

 

Introduction

 

Diaphragm seals, also known as chemical seals or gauge isolators, protect pressure-measuring instruments from hot, clogged, corrosive, sanitary, or other process fluids that threaten the instrument. The seal's flexibility is that the diaphragm securely seals the contents while penetrating the instrument for accurate pressure measurement.

 

Diaphragm seals are used to seal and protect instruments from process media and are flexible membranes that seal and insulate housings. The flexible nature of this seal allows pressure effects to pass through the barrier, but not through the contained material. Diaphragm seals are typical in healthcare and medical applications such as respiratory equipment such as spirometers, ventilators, air mixers, anesthesia equipment, blood analyzers, and hygienic pharmaceutical applications.

 

 

 

 

Application

 

Diaphragm seals are used in various medical, pharmaceutical, and biotechnological applications, especially in low-pressure valves. In a typical valve application, the diaphragm's sealing bead seals the valve when the valve is in the rest position, similar to a static gasket or O-ring. The actuator lifts the diaphragm, opening the valve to allow fluid flow; when the actuator is de-energized, a spring is typically used to return the diaphragm to its resting position.

 

Typical healthcare and medical applications for diaphragm seals: Respiratory equipment such as spirometers, ventilators, air mixers, anesthesia equipment, blood analyzers, and hygienic pharmaceutical applications.

 

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