HAL-LOK
Pneumatic Male VCR Diaphragm Valves
SKU QDGF-4C-LC-PCTFE
Fluid & Gas Control
Model and Connection Size
Seat Material
Pneumatic Male VCR Diaphragm Valves. Select the documented size and construction for quotation.
Models, sizes and drawing dimensions
| Catalogue basic reference | Specification |
|---|---|
| QDGF-4C | Connection size: 1/4 in.; Operation: Normally closed; Maximum working pressure: 250 psi (17.2 bar); Cv: 0.27; Seat options: PCTFE: -40 to 80°C; PFA or Vespel: -26 to 177°C; Internal/external helium leak rate: ≤1×10⁻⁹ std cm³/s |
| QDGF-4O | Connection size: 1/4 in.; Operation: Normally open; Maximum working pressure: 250 psi (17.2 bar); Cv: 0.27; Seat options: PCTFE: -40 to 80°C; PFA or Vespel: -26 to 177°C; Internal/external helium leak rate: ≤1×10⁻⁹ std cm³/s |
| QDGF-8C | Connection size: 1/2 in.; Operation: Normally closed; Maximum working pressure: 250 psi (17.2 bar); Cv: 0.7; Seat options: PCTFE: -40 to 80°C; PFA or Vespel: -26 to 177°C; Internal/external helium leak rate: ≤1×10⁻⁹ std cm³/s |
| QDGF-8O | Connection size: 1/2 in.; Operation: Normally open; Maximum working pressure: 250 psi (17.2 bar); Cv: 0.7; Seat options: PCTFE: -40 to 80°C; PFA or Vespel: -26 to 177°C; Internal/external helium leak rate: ≤1×10⁻⁹ std cm³/s |
Available options
| Option | Values |
|---|---|
| Material | 316L Stainless Steel |
| Seat material | PCTFE | PFA | Vespel |
Diaphragm Valve Seat Options
Seat: PCTFE (-40 to 80°C) | PFA (-26 to 177°C) | Vespel (-26 to 177°C). Maximum working pressure: 250 psi (17.2 bar). Confirm the selected construction and rating.
Ordering notes
- Internal LABCON suffix identifies seat choice; catalogue basic model retained.
Catalogue drawing dimensions are nominal. Pressure and temperature ratings depend on the selected material, seals and configuration. Confirm the complete manufacturer ordering code with the quotation.
Source references and links are provided in the product documentation fields.
Technical Specifications
| Model | Pneumatic Male VCR Diaphragm Valves |
|---|