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Daniel - Model V707 -Spring Loaded Back Pressure Valve
The Daniel V707 Spring Loaded Back Pressure Valve offers an innovative way to maintain back pressure and provides an integrated check functionality combining two valves in one, requiring no pilots or external actuation. The V707 is an addition to the Daniel 700 Series Control Valve family of products, applying the well-known and trusted Daniel Control Valves technology to maintain back pressure.
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- Flange Connections :
- Valve size: 2″ to 4″ Maximum working pressure at 100º F
- 285 psi (1,964 kPa)
- 740 psi (5,099 kPa)
- 1,480 psi (10,197 kPa)
- Temperature Range: -20º F to 150º F (-29º C to 66º C)
- Materials of Construction :
- Valve body: Carbon steel
- ASTM-A352-GR-LCC
- Cylinder: 17-4 stainless steel
- Piston: 304 stainless steel
- Seat Ring: 303 stainless steel
- Elastomers: Viton
- Spring: Chromium silicone (877 Grade A) (877 Grade A) springs
- Tubing and fittings: 316 stainless steel*
- *Pressure sensing line needed to perform check valve functionality. Not a pilot line
- Spring Ranges :
- Field adjustable, valve differential pressure range
- Range #1: 5 – 40 psi (single light spring)
- Range #2: 30 – 80 psi (single heavy spring)
- Range #3: 30 – 120 psi (light and heavy, nested springs)
- Selection Requirements :
- 1. Line Size
- 2. Pressure
- 3. Temperature
- 4. Set Point Pressure*
- 5. Flange Connections
- *Note: Set point is used to determine spring range. Customer will need to adjust set point in the field.
- No power required
- No diaphragms or stuffing boxes
- Modular construction: all internal parts, including seat ring, can be removed with the cylinder assembly without disturbing line connections
*Line must be drained and valve must be isolated for service. - 45º body design assures high capacity Positive shut-off, ANSI Leakage Class VI (ANSI B16.105 – 1976)
- Inherently check valve functionality Metal-to-metal seat with protected o-ring
- Full working pressure (ANSI 150, 300 and 600)
- Pilotless
- Tamper-proof set point locking capable