GB Standard Weir Pattern Fluorine Plastic Lined Diaphragm Valve

Design and manufacture: GB12239
Face to face dimension: GB12221, JB1688
Connection dimension of flange: GB4216, JB78

Purpose:

It's special for controlling the noncorrosive or the strong corrosive media. Its body inner surface is unlined or lined with different fluorine plastics which can be selected to suit with different working temperatures and fluid pipelines.
Suitable temperature: ≤ 85º C≤ 100º C≤ 120º C ≤ 150º C(According to the materials of lining and diaphragm)

Pressure raUng: PN (MPa)
0.6 1.0 1.6

Tests:

Lining layer: Electrospark detecting
Test to GB/T13927
Nominal pressure: PN(MPa)
Body: PN x 1.5
Seal: PN x l. 1

Materials:

Body: Cast iron, spheroidal graphite cast iron, carbon steel, stainless steel

Bonnet: Cast iron, spheroidal graphite cast iron, carbon steel, stainless steel

Lining: Unlined, fluorine plastic

Diaphragm: Fluorine plastic

Disc: Cast iron, stainless steel

Stem: Carbon steel, stainless steel

Handwheel: Cast iron

Features:

The diaphragm valve is an especial break valve:
1. The elastic sealed open and close element can avoid the inner leak.
2. The clipper-built interval channel can keep the small loss of pressure.
3. It hasn't the stuffing box, so it doesn't leak.
4. The body and bonnet are separated by the middle diaphragm in order that the bonnet and stem over the diaphragm aren't corroded by the medium.
5. The diaphragm is changeable and the expense of main- tenance is low.
6. The various lining materials can be suitable for all kinds of media and have the good corrosion-resistance.