Product Details

NON-LUBRICATED AIROPERATED VALVES FOR HIGH-PURITY APPLICATIONS

The R-K NLA series air valve features a compact plastic valve available in six different models for uses in which no lubrication is required or permitted in the valve. This patented valve is designed so there is no metal contact with the fluid. Engineered with automatic fail-safe shut-off, this 2-way air operated valve is designed to actuate at 40-80 PSI and operates in any position. This directacting full flow valve features top entry for easy in-line maintenance and minimum water hammer.

Primarily designed for minimum maintenance, it’s ideal for DI water and other high purity applications. Suitable for harsh chemicals that would remove the lubricant from ordinary valves.

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Seals :- EPDM, VITON, KALREZ, OTHER,

Valve Sizes

1/4" 1/2" 3/4" 1" 1 1/2" 2"

Non-Lubricated Design : Ideal for DI water and high-purity or aggressive chemical applications.

No Metal in Fluid Contact : Ensures purity and corrosion resistance.

Fail-Safe Shut-Off : Spring-return action for normally closed or normally open operation

Air Actuation : Operates efficiently at 40–80 PSI.

Top Entry Maintenance : Simplifies in-line servicing without removing the valve.

All-Position Operation: Can be installed in any orientation

Minimal Water Hammer : Smooth, direct-acting valve operation.

Type 1	Normally Closed	Most popular style. Fail-safe closed. Air pressure to the 1/8” top port opens the valve. Removing pressure allows the spring to close it.
Type 2	Normally Open	Fail-safe open. Air pressure to the top port closes the valve. Removing pressure allows the spring to reopen it.
Type 3	Air-to-Open, Air-to-Close	No spring action. Controlled through pneumatics. Air to the top port opens, air to the bottom port closes
Type 4	Bottom Flow Control	Adjustable screw/locknut on bottom sets flow rate. Air pressure opens the valve to a pre-set rate. Spring closes the valve when air is off.
Type 5	Top Flow Control	Adjustable screw/locknut on top controls preset flow even with no air pressure. Air pressure opens the valve to full flow; spring returns to pre-set position.
Type 6	Top and Bottom Flow Control	Combines Type 4 and Type 5 features with adjustable screws on both ends for maximum flow control flexibility. The chart below will specify R - K standard valves regarding valve size, valve material, an

During the assembly process, a small amount of DuPont Krytox is applied to assist in the break-in of moving parts, then carefully wiped off prior to final assembly and testing.

Test data was performed with 68°F water and 160 PSIG maximum pressure.

These performance curves will change with higher viscosity liquid and/or higher temperature. Consult your local sales representative or manufacturer directly for custom products or special applications.

Metrail	Temperature
OTHER	0°F-340°F
POLYPRO	0°F-180°F
PVC	0°F-140°F
PVDF	0°F-280°F
TEFLON	0°F-340°F

¼” to 1”: Female Pipe Thread (FPT)

1½” and 2”: Male Pipe Thread (MPT)

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