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Parker 337 Series Flow Control Valves efficiently meter flow of air in one direction while allowing free flow in the reverse direction to ensure maximum productivity. The plunger in these valves is a fine tapered needle, which provides precise flow control even at low flow rates. The perimeter of the adjustment knob features numerical micrometer position markings, providing a visual indication of the flow controls settings. Once the desired flow is selected, a set screw can be tightened to maintain the settings. Due to the light spring on the return check, the 337 flow controls have a 1 to 2 psig cracking pressure. Extended temperature versions up to 300 degrees F are available as specials.
Markets:
• Factory Automation
• Heavy Industries
Features/Benefits:
• Precise Low-Flow Control
• Heavy duty brass construction
• Micrometer visual set points
Applications:
• Cylinder speed control
| Media | Air |
|---|---|
| Division | Pneumatic Division |
| Product Type | Flow Control |
| Body Material | Brass |
| Seal Material | Urethane, Nitrile Butadiene Rubber (NBR) |
| Flow Rate | 32 to 327 SCFM (free flow), 15 to 140 SCFM (metered) |
| Mounting Type | Inline |
| Operation Type | Knob with Micrometer Position |
| Operating Temperature | 0° to +180° °F, -18° to +82° °C |
| Port Size | 1/8 inch |
| Port Type | NPT |
| Port Size (inch) | 1/8 |
| Port Connection | Female to Female |
| Operating Pressure | 0 to 250 psig, 0 to 17 bar |
| Flow Coefficient | 0.28 to 2.62 Cv (metered), 0.60 to 6.13 Cv (free flow) |
| Needle Material | Stainless Steel |
| Lubricant | None |
