DK Series Dialock Diaphragm Valve

Our new diaphragm valve is the ideal solution for modulating flow and controlling dirty or abrasive fluids in a variety of applications.

  • Improved flow rate
  • Facilitates precise linear flow regulation
  • Locking mechanism allows the manual handwheel to be adjusted and locked in over 300 positions

 

The new DK Series Dialock Diaphragm Valve is available in manual and pneumatically actuated versions. The diaphragm valve is the ideal solution for modulating flow and controlling dirty or abrasive fluids in a variety of applications.

The modular nature of this valve results in many material, body style, and diaphragm options. The re-designed weir style body has significantly improved the DK’s flow rate and it facilitates precise linear flow regulation through the valve’s full range of operation. This pneumatically actuated version provides automatic control with an extensive range of options and accessories.

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PRODUCT DETAILS

VALVE AVAILABILITY

BODY MATERIAL: PVC, CPVC, PP, PVDF

SIZE RANGE: 1/2" through 2-1/2"

PRESSURE: 150 psi

DIAPHRAGM: EPDM, FPM, or PTFE (EPDM Backed)

 

CONTROL STYLE: Manual – Handwheel, Pneumatic – Double Acting, Normally Open, Normally Closed

END CONNECTION: Spigot, True Union (Socket, Threaded), Flanged (ANSI 150)

DIALOCK LOCKING MECHANISM: Allows the manual handwheel to be adjusted and locked in over 300 positions

SPECIFICATIONS

DK Series Dialock® Manual Diaphragm Valves

 Sample Specification

  • Diaphragm Valves – DK Manual

1.1 Material

  • The valve body, including end connectors and unions, shall be made of PVC compound which shall meet or exceed the requirements of cell classification 12454 according to ASTM D1784.

or The valve body, including end connectors and unions, shall be made of Corzan® CPVC compound which shall meet or exceed the requirements of cell classification 23447 according to ASTM D1784.

or The valve body, including end connectors and unions, shall be made of stabilized PP homopolymer compound, also containing a RAL 7032 pigment, which shall meet or exceed the requirements of Type I Polypropylene according to ASTM D4101.

or The valve body, including end connectors and unions, shall be made of virgin, non-regrind PVDF compound which shall meet or exceed the requirements of Table 1 according to ASTM D3222.

  • The valve bonnet assembly shall be made of high temperature, high strength, glass-filled polypropylene (GFPP).

 

1.2 Diaphragm

  • The diaphragm shall be made of EPDM.

or The diaphragm shall be made of FPM.

or The diaphragm shall be made of PTFE (backed with EPDM).

 

2.0 Connections

 

2.1 Spigot Style

  • The IPS spigot PVC end connectors shall conform to the dimensional standard ASTM D1785.

or The IPS spigot CPVC end connectors shall conform to the dimensional standard ASTM F441.

or The Metric spigot PP end connectors shall conform to the dimensional standard ISO 3609.

or The Metric spigot PVDF end connectors shall conform to the dimensional standard ISO 10931.

 

2.2 Socket Style

  • The IPS socket PVC end connectors shall conform to the dimensional standards ASTM D2466 and ASTM D2467.

or The IPS socket CPVC end connectors shall conform to the dimensional standard ASTM F439.

or The Metric socket PP end connectors shall conform to the dimensional standard ISO 3609.

or The Metric socket PVDF end connectors shall conform to the dimensional standard ISO 10931.

 

2.3 Threaded Style

  • The female NPT threaded PVC end connectors shall conform to the dimensional standards ASTM D2464,

ASTM F1498, and ANSI B1.20.1.

or The female NPT threaded CPVC end connectors shall conform to the dimensional standards ASTM F437, ASTM F1498, and ANSI B1.20.1.

 

2.4 Flanged Style

  • The ANSI 150 flanged PVC end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged CPVC end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged PP end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged PVDF end connectors shall conform to the dimensional standard ANSI B16.5.

 

3.0 Design Features

  • All valves shall be weir-style for throttling applications.
  • All valves shall have a manual handwheel that can be adjusted and locked in over 300 positions.
  • The manual handwheel shall be made of high strength glass-filled polypropylene (GFPP).
  • All valves shall have a graduated optical position indicator to allow for a visual check of the valve position.
  • All valves shall have a custom labelling plate housed in a transparent cap.
  • All through bolts shall be made of stainless steel.
  • The valve shall incorporate a feature that allows an identification tag to be easily affixed to the valve body.
  • Bodies of PVC, CPVC and PP valves shall have brass mounting inserts.
  • Bodies of PVDF valves shall have stainless steel mounting inserts.

 

3.1 Pressure Rating

  • All valves shall be rated at 150 psi at 73°F.

 

3.2 Markings

  • All valves shall be marked to indicate size, material designation, and manufacturers name or trade mark.

 

3.3 Color Coding

  • All PVC valves shall be color-coded dark gray.

or All CPVC valves shall be color-coded light gray.

or All PP valves shall be color-coded beige gray.

or All PVDF valves shall not be color-coded and be white in appearance.

  • All bonnet assemblies shall be color-coded black.

 

4.0 All valves shall be Xirtec® 140 PVC, Corzan® CPVC, PP or

PVDF by IPEX or approved equal.

 

 

DK Series Dialock® Pneumatic Diaphragm Valves

 Sample Specification

 

1.0 Diaphragm Valves – DK Pneumatic

 

1.1 Material

  • The valve body, including end connectors and unions, shall be made of PVC compound which shall meet or exceed the requirements of cell classification 12454 according to ASTM D1784.

or The valve body, including end connectors and unions, shall be made of Corzan® CPVC compound which shall meet or exceed the requirements of cell classification

23447 according to ASTM D1784.

or The valve body, including end connectors and unions, shall be made of stabilized PP homopolymer compound, also containing a RAL 7032 pigment, which shall meet

or exceed the requirements of Type I Polypropylene according to ASTM D4101.

or The valve body, including end connectors and unions, shall be made of virgin, non-regrind PVDF compound which shall meet or exceed the requirements of Table 1 according to ASTM D3222.

  • The pneumatic valve bonnet assembly shall be made of high temperature, high strength, glass-filled polypropylene (GFPP).

 

1.2 Diaphragm

  • The diaphragm shall be made of EPDM.

or The diaphragm shall be made of FPM.

or The diaphragm shall be made of PTFE (backed with EPDM).

 

2.0 Connections

 

2.1 Spigot Style

  • The IPS spigot PVC end connectors shall conform to the dimensional standard ASTM D1785.

or The IPS spigot CPVC end connectors shall conform to the dimensional standard ASTM F441.

or The Metric spigot PP end connectors shall conform to the dimensional standard ISO 3609.

or The Metric spigot PVDF end connectors shall conform to the dimensional standard ISO 10931.

 

2.2 Socket Style

  • The IPS socket PVC end connectors shall conform to the dimensional standards ASTM D2466 and ASTM D2467.

or The IPS socket CPVC end connectors shall conform to the dimensional standard ASTM F439.

or The Metric socket PP end connectors shall conform to the dimensional standard ISO 3609.

or The Metric socket PVDF end connectors shall conform to the dimensional standard ISO 10931.

 

2.3 Threaded Style

  • The female NPT threaded PVC end connectors shall conform to the dimensional standards ASTM D2464, ASTM F1498, and ANSI B1.20.1.

or The female NPT threaded CPVC end connectors shall conform to the dimensional standards ASTM F437, ASTM F1498, and ANSI B1.20.1.

 

2.4 Flanged Style

  • The ANSI 150 flanged PVC end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged CPVC end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged PP end connectors shall conform to the dimensional standard ANSI B16.5.

or The ANSI 150 flanged PVDF end connectors shall conform to the dimensional standard ANSI B16.5.

 

3.0 Design Features

  • All valves shall be weir-style for throttling applications.
  • 1/2" and 3/4" valves shall have a standard optical position indicator to allow for a visual check of the valve position.
  • 1/2" and 3/4" valves shall have a custom labelling plate housed in a transparent cap.
  • All through bolts shall be made of stainless steel.
  • The valve shall incorporate a feature that allows an identification tag to be easily affixed to the valve body.
  • Bodies of PVC, CPVC and PP valves shall have brass mounting inserts.
  • Bodies PVDF valves shall have stainless steel mounting inserts.

 

3.1 Actuators

  • All actuators shall be made of high strength glass-filled polypropylene (GFPP).
  • 1/2" and 3/4" actuators shall be piston style.
  • 1/2" and 3/4" actuators shall have 6 independent cartridge springs arranged radially to uniformly distribute the load on the piston.
  • 1" through 2-1/2" actuators shall be diaphragm style.
  • 1" through 2-1/2" double-acting and fail safe to open actuators shall feature weak springs located in the center of the actuator.
  • 1" through 2-1/2" fail safe to close actuators shall feature three concentric springs located in the center of the actuator.
  • All spring shall be cut from spring grade steel for maximum memory life and epoxy coated for maximum chemical resistance.
  • The following accessories shall be available for all actuators: position indicator, stroke limiter, stroke limiter with position indicator, limit switch, limit switch box, 3-15 psi positioner, 4-20 mA positioner, pilot solenoid valve.

 

3.2 Pressure Rating

  • All valves shall be rated at 150 psi at 73ºF.

 

3.3 Markings

  • All valves shall be marked to indicate size, material designation, and manufacturers name or trade mark.

 

3.4 Color Coding

  • All PVC valves shall be color-coded dark gray.

or All CPVC valves shall be color-coded light gray.

or All PP valves shall be color-coded beige gray.

or All PVDF valves shall not be color-coded and be white in appearance.

  • All bonnet assemblies shall be color-coded black.

 

4.0 All valves shall be Xirtec® 140 PVC, Corzan® CPVC, PP or PVDF by IPEX or approved equal.