3G Check Valve – Ball Type
Designed to pass flow in one direction with minimum resistance and to prevent reverse or backflow of liquids, gases and vapours in pipelines.
They are installed
- e.g. in the discharge line, directly downstream of the pump, to prevent the siphoning of the pump or pump rotation in the opposite direction as a result of back-flowing liquids
- When vessels have to be vented/aerated within approximate setting ranges.
3G Check Valves are designed
- For media where stainless steel does not offer lasting corrosion resistance
- As an alternative to valves made of exotic expensive metals(Hastelloy, Monel, tantalum etc.)
- For pure and slightly solids-laden media
- For metal-reactive media, e.g. H2O2
- For pure media where good cleaning possibilities and anti-adhesive surfaces are important.
Operating range: Depending on design and material
- from -60 to +180 °C (-75 to 360 °F)
- from vacuum up to 16 bar (235 psi)
| Sr. | Part Name | Material |
| 1 | Body | Graded CI/DI/WCB/SS+PFA/FEP Lined |
| 2 | Ball | Solid PTFE |
| 3 | Fasteners | SS 304 |
|
Nominal Bore |
Lining Thickness (± 0.5) |
L |
H |
|
|
Inch |
Mm |
|||
|
½ |
15 |
3 |
108 |
105 |
|
¾ |
20 |
3 |
118 |
115 |
|
1 |
25 |
3 |
127 |
125 |
|
1½ |
40 |
3 |
165 |
160 |
|
2 |
50 |
3 |
178 |
175 |
|
3 |
80 |
3 |
203 |
240 |
|
4 |
100 |
3 |
229 |
270 |
|
6 |
150 |
3 |
400 |
330 |
|
8 |
200 |
4 |
600 |
360 |
|
10 |
250 |
4 |
800 |
482 |
Product features
A.
- Lining Virgin pure PFA or PTFE
- Suitable for corrosive, hazardous, pure, hot and highly permeating media
- Thick-walled, high permeation resistance
- Vacuum-resistant anchoring
- Lining optionally antistatic or highly permeation-resistant PFA-AS
B.
- Shell made of ductile cast iron EN-JS 1049 (ASTM A395) absorbs system and pipe forces
C.
- Shut-off elements: solid and hollow balls as well as solid and hollow plugs made of PTFE. For special cases made of stainless steel, Hastelloy etc.
- External corrosion protection Epoxy coating, nuts and bolts of stainless steel.