About Precision Flow-Adjustment Valves
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Flow-Adjustment Inline Hydraulic Valves
Turn the dial to gradually adjust the amount of flow. Five colored rings on the valve stem represent different flow rates. Adjust the dial until you see the color of the flow rate you need.
One-way with unrestricted reverse valves regulate flow in one direction while allowing oil to flow freely in the opposite direction. Two-way valves regulate flow in either direction.
Brass valves have better corrosion resistance than steel valves.
NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.
For technical drawings and 3-D models, click on a part number.
Inlet/Outlet Connection | O'all | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | ||||||||||||
| 1/8 | 02 | 3 | 0.23 | 5,000 | Buna-N Rubber | 2" | 3/4" | 1 3/4" | 2" | Needle | 0000000 | 000000 |
| 1/4 | 04 | 5 | 0.43 | 5,000 | Buna-N Rubber | 2 5/8" | 7/8" | 2" | 2 5/8" | Needle | 0000000 | 00000 |
| 3/8 | 06 | 8 | 0.79 | 5,000 | Buna-N Rubber | 2 3/4" | 1" | 2 1/2" | 2 3/4" | Needle | 0000000 | 00000 |
| 1/2 | 08 | 15 | 0.98 | 5,000 | Buna-N Rubber | 3 1/2" | 1 1/4" | 3" | 3 1/2" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 2.47 | 3,000 | Buna-N Rubber | 3 7/8" | 1 1/2" | 3 5/8" | 3 7/8" | Needle | 0000000 | 000000 |
| 1 | 16 | 40 | 5.25 | 3,000 | Buna-N Rubber | 5" | 1 7/8" | 5 1/8" | 5" | Needle | 0000000 | 000000 |
Brass Body | ||||||||||||
| 1/8 | 02 | 3 | 0.23 | 2,000 | Buna-N Rubber | 2" | 3/4" | 1 3/4" | 2" | Needle | 0000000 | 00000 |
| 1/4 | 04 | 5 | 0.43 | 2,000 | Buna-N Rubber | 2 5/8" | 7/8" | 2" | 2 5/8" | Needle | 0000000 | 00000 |
| 3/8 | 06 | 8 | 0.79 | 2,000 | Buna-N Rubber | 2 3/4" | 1" | 2 1/2" | 2 3/4" | Needle | 0000000 | 000000 |
| 1/2 | 08 | 15 | 0.98 | 2,000 | Buna-N Rubber | 3 1/2" | 1 1/4" | 3" | 3 1/2" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 2.47 | 2,000 | Buna-N Rubber | 3 7/8" | 1 1/2" | 3 5/8" | 3 7/8" | Needle | 0000000 | 000000 |
Inlet/Outlet Connection | O'all | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | ||||||||||||
| 7/16"-20 | 04 | 3 | 0.23 | 5,000 | Buna-N Rubber | 2 3/4" | 7/8" | 1 7/8" | 2 3/4" | Needle | 0000000 | 0000000 |
| 9/16"-18 | 06 | 5 | 0.43 | 5,000 | Buna-N Rubber | 3 1/8" | 1" | 2 1/4" | 3 1/8" | Needle | 0000000 | 000000 |
| 3/4"-16 | 08 | 8 | 0.79 | 5,000 | Buna-N Rubber | 3 1/2" | 1 1/8" | 2 5/8" | 3 1/2" | Needle | 0000000 | 000000 |
| 7/8"-14 | 10 | 15 | 0.98 | 5,000 | Buna-N Rubber | 4" | 1 1/4" | 3" | 4" | Needle | 0000000 | 000000 |
| 1 1/16"-12 | 12 | 25 | 2.47 | 3,000 | Buna-N Rubber | 4 5/8" | 1 1/2" | 3 5/8" | 4 5/8" | Needle | 0000000 | 000000 |
Inlet/Outlet Connection | O'all | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | ||||||||||||
| 1/8 | 02 | 3 | 0.23 | 5,000 | Buna-N Rubber | 1 1/2" | 3/4" | 1 3/4" | 1 1/2" | Needle | 0000000 | 000000 |
| 1/4 | 04 | 5 | 0.44 | 5,000 | Buna-N Rubber | 2" | 7/8" | 2" | 2" | Needle | 0000000 | 00000 |
| 3/8 | 06 | 8 | 0.79 | 5,000 | Buna-N Rubber | 2 1/2" | 1" | 2 1/2" | 2 1/2" | Needle | 0000000 | 00000 |
| 1/2 | 08 | 15 | 0.98 | 5,000 | Buna-N Rubber | 2 5/8" | 1 1/4" | 3" | 2 5/8" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 2.47 | 5,000 | Buna-N Rubber | 3 1/4" | 1 1/2" | 3 5/8" | 3 1/4" | Needle | 0000000 | 000000 |
Brass Body | ||||||||||||
| 1/8 | 02 | 3 | 0.23 | 2,000 | Buna-N Rubber | 1 1/2" | 3/4" | 1 3/4" | 1 1/2" | Needle | 0000000 | 00000 |
| 1/4 | 04 | 5 | 0.44 | 2,000 | Buna-N Rubber | 2" | 7/8" | 2" | 2" | Needle | 0000000 | 00000 |
| 3/8 | 06 | 8 | 0.79 | 2,000 | Buna-N Rubber | 2 1/2" | 1" | 2 1/2" | 2 1/2" | Needle | 0000000 | 000000 |
| 1/2 | 08 | 15 | 0.98 | 2,000 | Buna-N Rubber | 2 5/8" | 1 1/4" | 3" | 2 5/8" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 2.47 | 2,000 | Buna-N Rubber | 3 1/4" | 1 1/2" | 3 5/8" | 3 1/4" | Needle | 0000000 | 000000 |
Precision Flow-Adjustment Inline Hydraulic Valves
A tapered needle gives you more precise control than standard flow-adjustment inline hydraulic valves. Five colored rings on the valve stem represent different flow rates. Adjust the dial until you see the color of the flow rate you need.
NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.
For technical drawings and 3-D models, click on a part number.
Inlet/Outlet Connection | O'all | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | ||||||||||||
| 1/8 | 02 | 3 | 0.24 | 5,000 | Buna-N Rubber | 1 1/2" | 1 3/4" | 3" | 1 1/2" | Needle | 0000000 | 0000000 |
| 1/4 | 04 | 5 | 0.49 | 5,000 | Buna-N Rubber | 2" | 2" | 3 7/8" | 2" | Needle | 0000000 | 00000 |
| 3/8 | 06 | 8 | 1.29 | 5,000 | Buna-N Rubber | 2 1/2" | 2 1/2" | 4 3/8" | 2 1/2" | Needle | 0000000 | 000000 |
| 1/2 | 08 | 15 | 1.93 | 5,000 | Buna-N Rubber | 2 5/8" | 3 1/4" | 5 3/4" | 2 5/8" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 3.21 | 5,000 | Buna-N Rubber | 3 1/4" | 3 7/8" | 6 3/8" | 3 1/4" | Needle | 0000000 | 000000 |
Inlet/Outlet Connection | O'all | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | ||||||||||||
| 7/16"-20 | 04 | 3 | 0.24 | 5,000 | Buna-N Rubber | 2" | 1 3/4" | 3 1/4" | 2" | Needle | 0000000 | 0000000 |
| 9/16"-18 | 06 | 5 | 0.49 | 5,000 | Buna-N Rubber | 2 3/8" | 2" | 4" | 2 3/8" | Needle | 0000000 | 000000 |
| 3/4"-16 | 08 | 8 | 1.29 | 5,000 | Buna-N Rubber | 3" | 2 1/2" | 4 7/8" | 3" | Needle | 0000000 | 000000 |
| 1 1/16"-12 | 12 | 25 | 3.21 | 5,000 | Buna-N Rubber | 4" | 3 7/8" | 6 3/8" | 4" | Needle | 0000000 | 000000 |
Adjustable Flow-Regulating Inline Hydraulic Valves
Set your flow rate and then adjust it as necessary; these valves maintain flow rate despite pressure changes in the system. Five colored rings on the valve stem represent different flow rates. Adjust the dial until you see the color of the flow rate you need.
One-way valves regulate flow in one direction. They are not recommended for systems that may have reverse flow. One-way with unrestricted reverse valves regulate flow in one direction while allowing fluid to flow freely in the opposite direction.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
Inlet/Outlet Connection | O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Max. Flow Rate, gpm | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | |||||||||||
| 1/4 | 04 | 3 | 3,000 | Buna-N Rubber | 3 5/8" | 1 3/8" | 2 3/4" | 3 5/8" | Needle | 0000000 | 0000000 |
| 3/8 | 06 | 6 | 3,000 | Buna-N Rubber | 4 1/8" | 1 1/2" | 3 1/8" | 4 1/8" | Needle | 0000000 | 000000 |
| 1/2 | 08 | 15 | 3,000 | Buna-N Rubber | 5" | 1 3/4" | 4" | 5" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 3,000 | Buna-N Rubber | 5 7/8" | 2 1/4" | 5 1/8" | 5 7/8" | Needle | 0000000 | 000000 |
Inlet/Outlet Connection | O'all | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Max. Flow Rate, gpm | Max. Pressure, psi | Seal Material | Lg. | Wd. | Ht. | Port-to-Port Lg. | Valve Type | Each | |
Steel Body | |||||||||||
| 1/4 | 04 | 3 | 3,000 | Buna-N Rubber | 3 5/8" | 1 3/8" | 2 1/2" | 3 5/8" | Needle | 0000000 | 0000000 |
| 3/8 | 06 | 6 | 3,000 | Buna-N Rubber | 4 1/8" | 1 1/2" | 2 7/8" | 4 1/8" | Needle | 0000000 | 000000 |
| 1/2 | 08 | 15 | 3,000 | Buna-N Rubber | 5" | 1 3/4" | 3 3/4" | 5" | Needle | 0000000 | 000000 |
| 3/4 | 12 | 25 | 3,000 | Buna-N Rubber | 5 7/8" | 2 1/4" | 4 5/8" | 5 7/8" | Needle | 0000000 | 000000 |
| 1 | 16 | 50 | 3,000 | Buna-N Rubber | 7" | 2 3/4" | 6 1/4" | 7" | Needle | 0000000 | 000000 |
Flow-Regulating Inline Hydraulic Valves
Maintain a fixed flow rate even if pressure changes in the system. These valves regulate flow in one direction while allowing fluid to flow freely in the opposite direction.
NPTF (Dryseal) threads are compatible with NPT threads.
UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.
For technical drawings and 3-D models, click on a part number.
Flow-Adjustment Screw-In Hydraulic Valves
Turn the knob to gradually adjust the amount of flow. These compact valves screw into your mounting block. They are also known as needle valves and cartridge valves.
For technical drawings and 3-D models, click on a part number.
Body | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deltrol Equivalent Model No. | Hydraforce Equivalent Model No. | Parker Equivalent Model No. | Thread Size | Dash Size | Max. Flow Rate, gpm | Flow Coefficient (Cv) | Max. Pressure, psi | Seal Material | O'all Ht. | Valve Type | Each | |
Two Way—UN/UNF (SAE Straight) | ||||||||||||
Black Anodized Aluminum Body | ||||||||||||
| DNV-080-N-K | NV08-20B-0-N | NVH081-K-N | 3/4"-16 | 08 | 12 | 0.47 | 3,000 | Buna-N Rubber | 2 3/8" | Needle | 0000000 | 000000 |
| DNV-100-N-K | NV10-20B-0-N | NVH101-K-N | 7/8"-14 | 10 | 12 | 1.25 | 3,000 | Buna-N Rubber | 2 5/8" | Needle | 0000000 | 00000 |
High-Pressure Threaded Precision Flow-Adjustment Valves
Often used in hydraulic and compressed air systems, these valves can withstand at least 6,000 psi. Turn the handle to adjust flow in small increments for metering, sampling, and other applications requiring fine flow control.
316 stainless steel valves are more corrosion resistant than brass and steel valves.
Metal-to-metal seats resist temperature fluctuations.
Bubble-tight soft seats provide a tighter seal than metal-to-metal seats when the valve is completely closed.
Valves with packing have a nut that can be tightened to compress the packing if it leaks.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.
- Valve Type: Needle
- For Use With: See table
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Packing Material | End-to-End Lg. | For Use With | Each | ||
NPT Female × NPT Female | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| D | 1/4 | 0.6 | 10000 psi @ 100° F | -50° to 1000° | Graphite | 2 1/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 0000000 |
| D | 3/8 | 0.87 | 10000 psi @ 100° F | -50° to 1000° | Graphite | 2 1/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| D | 1/2 | 0.77 | 10000 psi @ 100° F | -50° to 1000° | Graphite | 2 3/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| Q | 3/4 | 2.67 | 10000 psi @ 100° F | -50° to 1000° | Graphite | 3 3/16" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 000000 | 000000 |
| Q | 1 | 2.61 | 10000 psi @ 100° F | -50° to 1000° | Graphite | 3 5/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
- Valve Type: Needle
- Seal Material: See table
- For Use With: See table
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Seal Material | Packing Material | End-to-End Lg. | For Use With | Each | ||
NPT Female × NPT Female | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| D | 1/4 | 0.6 | 10000 psi @ 100° F | -50° to 1000° | __ | Graphite | 2 1/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 0000000 |
| D | 3/8 | 0.87 | 10000 psi @ 100° F | -50° to 1000° | __ | Graphite | 2 1/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| D | 1/2 | 0.77 | 10000 psi @ 100° F | -50° to 1000° | __ | Graphite | 2 3/4" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| G | 1/8 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
| G | 1/4 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
| K | 1/4 | 0.63 | 15000 psi @ 70° F | -100° to 400° | __ | PTFE Plastic | 2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| K | 3/8 | 0.75 | 15000 psi @ 70° F | -100° to 400° | __ | PTFE Plastic | 2 1/2" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| K | 1/2 | 1.3 | 15000 psi @ 70° F | -100° to 400° | __ | PTFE Plastic | 3" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| Q | 3/4 | 2.67 | 10000 psi @ 100° F | -50° to 1000° | __ | Graphite | 3 3/16" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
| Q | 1 | 2.61 | 10000 psi @ 100° F | -50° to 1000° | __ | Graphite | 3 5/8" | Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon | 0000000 | 000000 |
NPT Male × NPT Female | ||||||||||
| H | 1/8 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
| H | 1/4 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
NPT Male × NPT Male | ||||||||||
| J | 1/8 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
| J | 1/4 | 0.42 | 10000 psi @ 200° F | -10° to 200° | Fluoroelastomer Rubber/PTFE Plastic | __ | 1 13/16" | Water, Oil | 0000000 | 00000 |
- Valve Type: Needle
- For Use With: Water, Air, Argon, Helium, Krypton, Neon, Xenon
- Seal Material: Fluoroelastomer Rubber
| Pipe Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | End-to-End Lg. | Each | ||
NPT Female × NPT Female | |||||||
|---|---|---|---|---|---|---|---|
| L | 1/4 | 0.76 | 6000 psi @ 200° F | -10° to 200° | 2 1/2" | 0000000 | 0000000 |
| L | 1/2 | 0.76 | 6000 psi @ 200° F | -10° to 200° | 2 1/2" | 0000000 | 000000 |
NPT Male × NPT Female | |||||||
| M | 1/4 | 0.76 | 6000 psi @ 200° F | -10° to 200° | 3 1/2" | 0000000 | 000000 |
| M | 1/2 | 0.76 | 6000 psi @ 200° F | -10° to 200° | 3 1/2" | 0000000 | 000000 |
Flow-Adjustment Valves for Hydraulic Jacks
Control the flow of oil to adjust ram speed, or shut it off to temporarily hold a load.
For technical drawings and 3-D models, click on a part number.