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SPDST series

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SPDST Series Product Applications

This SPDST (Diaphragm Design) tee valve series is designed for high-performance gas and chemical distribution systems combined with the lowest operating cost, make this valve an excellent consideration for:

  • High-purity gas distribution system control

  • High-purity gas valves for point-of-use service

  • Superior containment and cleanliness for your most critical valve applications

  • Suitable for inert and most spec. gases


SPDS Series Product Features

  • High Cv Manual Diaphragm Valve, Compact "T" Round Body Design

  • Ultra-High Purity Bar Stock Stainless Steel/PCTFE/Vespel Valve Construction

  • **Elgiloy Tied-Diaphragm for Maximum Flow on Valve Sizes-.500" and.750" Only

  • Springless, Packless Design-Low Dead Volume/ Internal Flowpath

  • 10 Ra Max-Electropolished Surface Finish- Std (Optional Surface Finishes Available)

  • Purge Connections and Purge Valves are Integrated in Valve Body

  • Valve Body and Tube Stubs are Serialized for Material Certification


SPDST Construction Materials

SPDST series


SPDST Series Technical Data

MATERIAL OF CONSTRUCTIONWetted Areas*Elgiloy®, 316L Stainless Steel, PCTFE
Non-Wetted Areas316L Stainless Steel, 303 Stainless Steel
MAXIMUM OPERATING PRESSURESPDST 250 & 375 & 525Vacuum to 375 psig (0-25.8 bar)
SPDST 500 & 755
SPDST 750 & 1075
MAXIMUM OPERATING TEMPERATUREPCTFE Seat – Std-22°F (-30°C) to 180°F (82°C)
*Vespel® Seat (High Temp)181°F (83°C) to 302°F (150°C)
INTERNAL VOLUMESPDST 250/2500.124 in³ (2.032 cm³)
SPDST 375/3750.177 in³ (2.901 cm³)
SPDST 525/2500.177 in³ (2.901 cm³)
SPDST 525/3750.177 in³ (2.901 cm³)
SPDST 500/2500.816 in³ (13.374 cm³)
SPDST 500/3750.816 in³ (13.374 cm³)
SPDST 500/5000.816 in³ (13.374 cm³)
SPDST 755/5000.816 in³ (13.374 cm³)
SPDST 750/7501.881 in³ (30.824 cm³)
SPDST 1075/7501.881 in³ (30.824 cm³)

*Vespel® is a registered trademark of DuPont Company.

**Elgiloy® is a registered trade mark of Elgiloy Specialt Metals


VALVE MODELSBODY DATAFLOW COEFFICIENT
(SeriesSize-Inch)(Tube/Body (Seat-Orifice) Sizes)Cv
SPDST 250/250Ø.250 / .250 (.250 in. (Ø6.35mm)-Orifice)0.41
SPDST 375/375Ø.375 / .250 (.250 in. (Ø6.35mm)-Orifice)0.64
SPDST 525/250Ø.500 / .250 (.250 in. (Ø6.35mm)-Orifice)0.68
SPDST 525/375Ø.500 / .250 (.250 in. (Ø6.35mm)-Orifice)0.70
SPDST 500/250Ø.500 / .500 (.500 in. (Ø12.7mm)-Orifice)2.81
SPDST 500/375Ø.500 / .500 (.500 in. (Ø12.7mm)-Orifice)2.81
SPDST 500/500Ø.500 / .500 (.500 in. (Ø12.7mm)-Orifice)2.81
SPDST 755/500Ø.750 / .500 (.500 in. (Ø12.7mm)-Orifice)3.15
SPDST 750/750Ø.750 / .750 (.625 in. (Ø15.9mm)-Orifice)4.70
SPDST 1075/750Ø1.000 / .750 (.625 in. (Ø15.9mm)-Orifice)4.36


HELIUM LEAK TESTInboard≤ 1 x 10⁻⁹ std.cc (atm) He / sec
Across the Seat≤ 1 x 10⁻¹⁰ std.cc (atm) He / sec
Outboard Pressure Test≤ 1 x 10⁻⁶ std.cc (atm) He / sec
CLEANLINESS AND PACKAGINGAssembled and tested in Class 100 Cleanroom. Purged and Final Packaged in Class 1 Cleanroom. Double-bag Packaging (2 mil nylon inner bag, 6 mil polyethylene outer bag) with Ultra-High Purity N₂ gas environment.
STANDARD FINISH10 Ra Max – Electropolished Surface Finish – Std (Optional surface finishes available)
NOTES AND OPTIONS

Testing: Particle, Moisture, O₂, SEM, ESCA, and AE

SPurge Connection – Valve Type/Location Size .250

Valve Connection Ends – Inlet/Outlet Sizes .250 to 1.000

Valve Body Mounting Holes Std. Options:

1) SPDST 250 to 750 – M5 x 0.8 or 10-32UNC-2B

Integral Lock-out Design Handle – Sizes .250 / .500

Specifications are subject to change without notice.


SPDST Series Technical Dimensions

SERIES/SIZE (INCH)ABCDEFGHJKLM
SPDST 250/250Ø 250 (6.4mm)0.035 (0.89mm)0.50 (12.7mm)3.04 (77.2mm)7.35 (186.7mm)Ø 250 (6.4mm)0.035 (0.89mm)3.68 (93.5mm)1.98 (50.3mm)2.55 (64.8mm)6.23 (158.2mm)4.68 (118.9mm)
SPDST 375/375Ø 375 (9.5mm)0.035 (0.89mm)0.50 (12.7mm)3.04 (77.2mm)7.35 (186.7mm)Ø 375 (9.5mm)0.035 (0.89mm)3.68 (93.5mm)1.98 (50.3mm)2.55 (64.8mm)6.23 (158.2mm)4.68 (118.9mm)
SPDST 525/250Ø 500 (12.7mm)0.049 (1.2mm)0.50 (12.7mm)3.04 (77.2mm)7.35 (186.7mm)Ø 250 (6.4mm)0.035 (0.89mm)3.68 (93.5mm)1.98 (50.3mm)2.55 (64.8mm)6.23 (158.2mm)4.68 (118.9mm)
SPDST 525/375Ø 500 (12.7mm)0.049 (1.2mm)0.50 (12.7mm)3.04 (77.2mm)7.35 (186.7mm)Ø 375 (9.5mm)0.035 (0.89mm)3.68 (93.5mm)1.98 (50.3mm)2.55 (64.8mm)6.23 (158.2mm)4.68 (118.9mm)
SPDST 500/250Ø 500 (12.7mm)0.049 (1.2mm)0.46 (11.7mm)3.04 (77.2mm)8.08 (205.2mm)Ø 250 (6.4mm)0.035 (0.89mm)4.04 (102.6mm)2.34 (59.4mm)2.91 (73.9mm)7.00 (177.8mm)5.29 (134.4mm)
SPDST 500/375Ø 500 (12.7mm)0.049 (1.2mm)0.46 (11.7mm)3.04 (77.2mm)8.08 (205.2mm)Ø 375 (9.5mm)0.035 (0.89mm)4.04 (102.6mm)2.34 (59.4mm)2.91 (73.9mm)7.00 (177.8mm)5.29 (134.4mm)
SPDST 500/500Ø 500 (12.7mm)0.049 (1.2mm)0.46 (11.7mm)3.04 (77.2mm)8.08 (205.2mm)Ø 500 (12.7mm)0.049 (1.2mm)4.04 (102.6mm)2.34 (59.4mm)2.91 (73.9mm)7.00 (177.8mm)5.29 (134.4mm)
SPDST 755/500Ø 750 (19.1mm)0.065 (1.65mm)0.46 (11.7mm)3.04 (77.2mm)8.08 (205.2mm)Ø 500 (12.7mm)0.049 (1.2mm)4.00 (101.6mm)2.34 (59.4mm)2.91 (73.9mm)7.00 (177.8mm)5.25 (133.4mm)
SPDST 750/750Ø 750 (19.1mm)0.065 (1.65mm)0.69 (17.5mm)3.06 (77.7mm)8.59 (218.2mm)Ø 750 (19.1mm)0.065 (1.65mm)4.29 (109.0mm)2.65 (67.3mm)3.20 (81.3mm)7.50 (190.5mm)5.79 (147.1mm)
SPDST 1075/750Ø 1.000 (25.4mm)0.065 (1.65mm)0.69 (17.5mm)3.06 (77.7mm)8.59 (218.2mm)Ø 750 (19.1mm)0.065 (1.65mm)4.29 (109.0mm)2.65 (67.3mm)3.20 (81.3mm)7.50 (190.5mm)5.79 (147.1mm)


SPDST Series Typical Valve Dimensions

SPDST series


SPDST Series Ordering Code

SPDST series

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