Features:
Diaphragm metal-to-metal sealed to atmosphere
Optimal design for long cycle life
Handle with window provides visual indication of OPEN and CLOSE positions
Size | 1/4" | 3/8",1/2" | 3/4" |
Flow Coefficient | 0.27 | 0.7 | 1.7 |
Maximum working pressure | 300psi(20.7bar) | ||
Working Temperatute | PCTFE | -40¡æ to 80¡æ(-40¨H to 176¨H) | |
PFA,Vespel® | -26¡æ to 177¡æ(-15¨H to 350¨H) | ||
Leak Rate | ≤1×10-9std cm3/s(He) | ||

Basic Ordering Numbe | VCR Size | Dimensions,mm | ||||||
| A | B | C | D | E | F | G | ||
FDGM-4 | 1/4in. | 70.6 | 11.0 | 63.0 | 40.0 | 25.0 | 26.0 | 25.4 |
| FDGM-8 | 1/2in. | 86.0 | 16.0 | 76.0 | 40.0 | 36.0 | 36.0 | 28.0 |