Plastic Needle Valves | McMaster-Carr

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453 Products

Flow-Adjustment Valves

Precision Flow-Adjustment Valves

High-Pressure Threaded Precision Flow-Adjustment Valves

Withstand at least 6,000 psi in hydraulic and compressed air systems

42 products

Threaded Precision Flow-Adjustment Valves

Adjust flow in small increments for fine control, such as in metering or sampling

32 products

Precision Flow-Adjustment Valves with Yor-Lok Fittings

Two sleeves bite into tubing as you tighten the nut for a strong grip and seal

4 products

High-Precision Threaded Flow-Adjustment Valves

Adjust flow in smaller increments than other valves for finer control over the flow rate

9 products

Plastic Threaded Precision Flow-Adjustment Valves

A lightweight alternative to metal for adjusting flow in small increments

11 products

Easy-Set Plastic Threaded Precision Flow-Adjustment Valves

Color-coded threads and numerical markings ensure consistent and repeatable settings

12 products

Panel-Mount Threaded Precision Flow-Adjustment Valves

Use the hex nut and threads that sit below the handle to install in instrument panels

12 products

Precision Flow-Adjustment Valves with Push-to-Connect Fittings

Insert tubing into the fittings—no heat, solder, or flux required

5 products

Precision Flow-Adjustment Valves with Barbed Fittings

Barbs grip onto tubing for a secure hold

7 products

High-Pressure Threaded Precision Flow-Adjustment Valves with Vent Ports

Isolate gauges, switches, and more for interruption-free maintenance, calibration, and sampling

2 products

Threaded Precision Flow-Adjustment Valves with Gauge Ports

Install two pieces of instrumentation to monitor multiple media without interrupting flow

4 products

Threaded Precision Flow-Adjustment Valves with Vent Port

Remove instrumentation equipment without depressurizing your line

8 products

Precision Flow-Adjustment Valves for Steam

High-Pressure Threaded Precision Flow-Adjustment Valves for Steam

Withstand a maximum steam pressure of at least 4,800 psi at 355° F

3 products

Precision Flow-Adjustment Valves with Sanitary Quick-Clamp Fittings for Clean Steam

Smooth internal surfaces prevent product buildup and inhibit bacteria growth

7 products

Precision Flow-Adjustment Valves with Yor-Lok Fittings for Steam

Two sleeves bite into tubing as you tighten the nut for a stronger grip and seal

3 products

Threaded Precision Flow-Adjustment Valves for Steam

Use in applications with steam pressure up to 200 psi at 450° F

1 product

Precision Flow-Adjustment Valves for Chemicals

Threaded Precision Flow-Adjustment Valves for Chemicals

A fluoroelastomer seal and plastic body withstand corrosive solutions

9 products

Precision Flow-Adjustment Valves with Yor-Lok Fittings for Chemicals

Two sleeves bite into tubing as you tigthen the nut for a stronger grip and seal

3 products

Precision Flow-Adjustment Valves with Push-to-Connect Fittings for Chemicals

Insert tubing into the fittings—no heat, solder, or flux required

2 products

Precision Flow-Adjustment Valves with Barbed Fittings for Chemicals

Barbs grip onto tubing for a secure hold

3 products

Precision Flow-Adjustment Valves for Food and Beverage

Precision Flow-Adjustment Valves with Push-to-Connect Fittings for Food and Beverage

Insert tubing into the fittings—no heat, solder, or flux required

2 products

Precision Flow-Adjustment Valves with Barbed Fittings for Food and Beverage

Barbs grip onto tubing for a secure hold

2 products

Metering Valves for Abrasive Blasting

Control the amount of abrasive material that your blast hose releases

8 products

Other Products

Air Flow Control Valves

Control the speed of air-powered equipment by adjusting the volume of airflow entering or exiting

243 products

On-Off Valves

Start and stop flow through a line

1 product

Air-Exhaust Valves

Vent or divert exhaust to speed up the operation of air cylinders, actuators, and other equipment

11 products

Oil Brushes

Connect to oil dispensers to brush lubricant onto chain, gears, and conveyors

8 products

Flow-Adjustment Valve Manifolds

Control flow to multiple points from one source

1 product