Diaphragm Valves—DL Series and DS Series
Swagelok® DL series and DS series diaphragm valves offer packless, all metal containment for high-purity and ultrahigh-purity applications up to 3500 psig.

	Specifications Working Pressure Temperature Flow Coefficient Body Material Diaphragm Material End Connections • Type • Size	Up to 3500 psig (241 bar) –100 to 250°F (–73 to 121°C) Up to 0.30 316L stainless steel 316 stainless steel Swagelok tube fitting, VCR® face seal fitting, VCO® O-ring fitting, tube butt weld, tube socket weld 1/4, 3/8, and 1/2 in.; 6 and 8 mm

More information
Download the Diaphragm Valves—DL and DS Series catalog.
Download the DL and DS Series Diaphragm Valve Technical Report.
Find high-purity, high-pressure diaphragm valves in the product search.

Features

• Repetitive shutoff with fully contained soft-seat stem tip
• Bottom mounting and panel mounting standard
• DL series (lever handle)
• Quarter-turn actuation
• Position indicator ring
• Splined handle and actuator prevents slippage
• DS series (rotary handle)
• Approximately one and one-half turns to operate from fully open to closed.

Process Specifications

• Standard, no process designator: Special Cleaning and Packaging (SC-11)
  • Special cleaning with non–ozone-depleting chemicals
  • Performed in specially cleaned areas; valves are individually bagged
  • 20 µin. (0.51 µm) average, machine finished.
• Ultrahigh-purity, process designator P: Ultrahigh-Purity Process Specification (SC-01)
  • Ultrahigh-purity cleaning with a continuously monitored, deionized water, ultrasonic cleaning system
  • Performed in ISO Class 4 work areas; valves are double bagged and vacuum sealed in cleanroom bags
  • 8 µin. (0.20 µm) average, machine finished and electropolished.

Testing
Inboard helium leak tested to a rate of 4 × 10^–9 std cm³/s at the seat, envelope, and all seals.

Multiport and Elbow Diaphragm Valves and Multivalve Manifolds
DL and DS series diaphragm valves are available in multiport and elbow configurations; see the Swagelok Bellows- and Diaphragm-Sealed Multiport and Elbow Valves Selection Guide. Multivalve manifolds are also available; contact your authorized Swagelok sales and service representative.

Options

• PCTFE stem tip is standard; PTFE and polyimide material are available.
• Stem replacement and diaphragm seal kits are available.
• Green handles are standard; a variety of other colors are available.