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Bulk Instrumentation and Accessories • Instrument Valves & Manifolds
Metering Valves
NS Series DESCRIPTION
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The Parker NS Series of metering valves are designed to provide accurate and stable control of flow rates in analytical, instrumentation, and research applications. A variety of connection sizes, body patterns and materials of construction provide considerable application versatility. For higher flow rates, refer to the NM and NL Series of metering valves.
FEATURES
• Precision tapered valve stem accurately controls flow • Brass or 316 SS forged body construction • Panel or in-line mounting
• Positive handle stop prevents overtightening • Angle or in-line patterns • Valve stem threads not in contact with process fluid • 100% function tested
• Optional stem seals and handles SPECIFICATIONS
Pressure Rating at all temperatures: 2000 psig (138 bar) CWP Flow Data: Orifice:
In-line pattern: Angle pattern: Stem Taper:
Turns to open:
Valve / Seal Temperature Ratings Nitrile Rubber:
Ethylene Propylene Rubber: Neoprene Rubber:
Fluorocarbon Rubber:
Highly Fluorinated Fluorocarbon Rubber:
0.03" (0.76mm) Cv Cv
1° 13 +/- 1
-10°F to 250°F (-23°C to 121°C) -40°F to 250°F (-40°C to 121°C) -40°F to 250°F (-40°C to 121°C) -10°F to 400°F (-23°C to 204°C) -25°F to 200°F (-32°C to 93°C)
Note: These products are not intended for use as shutoff valves.
= 0.039; Xт = 0.64 = 0.042; Xт = 0.53
NM/NL Series
DESCRIPTION The Parker NM and NL Series of metering valves provide higher flow rates than the NS Series of metering valves and retain most of the features found in the NS Series.
FEATURES
• Precisely tapered valve stem accurately controls flow • Brass or 316 SS forged body construction • Panel or in-line mounting • Angle or in-line patterns • Valve stem threads not in contact with process fluid • 100% function tested
• Optional stem seals and handles SPECIFICATIONS Pressure Rating at all temperatures:
NM Specifications Flow Data: Orifice:
In-line pattern: Angle pattern: Stem Taper:
Turns to open:
NL Specifications Flow Data: Orifice:
In-line pattern: Angle pattern: Stem Taper:
Turns to open:
Valve / Seal Temperature Ratings Nitrile Rubber:
Ethylene Propylene Rubber: Neoprene Rubber:
Fluorocarbon Rubber:
Highly Fluorinated Fluorocarbon Rubber:
1000 psig (69 bar) CWP
0.06" (1.5mm) Cv
Cv 3°
= 0.055; Xт = 0.41 = 0.057; Xт = 0.38
9 +/- 1
0.13" (3.3mm) Cv
Cv 5°
= 0.207; Xт = 0.71 = 0.299; Xт = 0.60
10 +/- 1
-10°F to 250°F (-23°C to 121°C) -40°F to 250°F (-40°C to 121°C) -40°F to 250°F (-40°C to 121°C) -10°F to 400°F (-23°C to 204°C) -25°F to 200°F (-32°C to 93°C)