Brooks Instrument Control Valve User Manual
Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
NRS*
Needle Control Valves
Models 8503, 8504, 8513 & 8514
Model 8504
Straight
Pattern
Needle Valve
Model 8513 Angle Pattern
Needle Valve with
Numerical Handle
Installation and Operation Manual
X-V A-8503-eng
Part Number: 541B087AHG
Needle Control Valves Models 8503 and 8504
March, 2008
Essential Instructions
Read this page before proceeding!
Brooks Instrument designs, manufactures and tests its products to meet many national and international standards. Because
these instruments are sophisticated technical products, you must properly install, use and maintain them to ensure they
continue to operate within their normal specifications. The following instructions must be adhered to and integrated into your
safety program when installing, using and maintaining Brooks Products.
• Read all instructions prior to installing, operating and servicing the product. If this instruction manual is not the correct
manual, please see back cover for local sales office contact information. Save this instruction manual for future reference.
• If you do not understand any of the instructions, contact your Brooks Instrument representative for clarification.
• Follow all warnings, cautions and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation and maintenance of the product.
• Install your equipment as specified in the installation instructions of the appropriate instruction manual and per applicable
local and national codes. Connect all products to the proper electrical and pressure sources.
• T o ensure proper performance, use qualified personnel to inst all, operate, update, program and maintain the product.
• When replacement parts are required, ensure that qualified people use replacement parts specified by Brooks Instrument.
Unauthorized parts and procedures can affect the product's performance and place the safe operation of your process at
risk. Look-alike substitutions may result in fire, electrical hazards or improper operation.
• Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is being
performed by qualified persons, to prevent electrical shock and personal injury.
Pressure Equipment Directive (PED)
All pressure equipment with an internal pressure greater than 0.5 bar (g) and a size larger than 25mm or 1" (inch) falls under the
Pressure Equipment Directive (PED). The Directive is applicable within the European Economic Area (EU plus Norway, Iceland
and Liechtenstein). Pressure equipment can be traded freely within this area once the PED has been complied with.
• Section 1 of this manual contains important safety and operating instructions related to the PED directive.
• Meters described in this manual are in compliance with EN directive 97/23/EC module H Conformity Assessment.
• All Brooks Instrument Flowmeters fall under fluid group 1.
• Meters larger than 25mm or 1" (inch) are in compliance with category I, II, III of PED.
• Meters of 25mm or 1" (inch) or smaller are Sound Engineering Practice (SEP).
Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
Paragraph Page
Number Number
Introduction Section 1
1-1 Description .....................................................................................................................................1-1
1-2 Specifications.................................................................................................................................. 1-1
Installation Section 2
2-1 General ...........................................................................................................................................2-1
2- 2 Receipt of Equipment ......................................................................................................................2-1
2- 3 Recommended Storage Practice .....................................................................................................2-1
2- 4 Return Shipment ............................................................................................................................. 2-2
2- 5 Transit Precautions ......................................................................................................................... 2-2
2-6 Removal from Storage ..................................................................................................................... 2-2
2-7 Installation ...................................................................................................................................... 2-2
2- 8 Panel Mounting NRS Valve..............................................................................................................2-3
2- 9 Panel Mounting NRS Valve with Digit al Handle ................................................................................ 2-4
Operation Section 3
3- 1 Operating Precaution ...................................................................................................................... 3-1
3-2 General ...........................................................................................................................................3-1
Needle Control Valves Models 8503 & 8504
Contents
Maintenance Section 4
4-1 Maintenance ................................................................................................................................... 4-1
Warranty, Local Sales/Service Contact Information ....................................................................... Back Cover
FIGURES
Figure Page
Number Number
1- 1 Dimensions, Models 8503 & 8504 ................................................................................................... 1-3
1- 2 Exploded View NRS Valve............................................................................................................... 1-3
1- 3 Numerical Handle and NRS Needle Valve........................................................................................ 1-3
2- 1 Panel Mounting Drawing.................................................................................................................. 2-3
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Contents
Needle Control Valves Models 8503 & 8504
Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
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INTENTIONALLY
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Installation and Operation Manual
X-VA-8503-eng
Part Number: 541B087AHG
March, 2008
1-1 Description
Brooks® NRS (Non-Rising Stem) Needle V alves are designed specifically for
low flow gas and liquid applications. Straight and angle p attern models in
Brass or Stainless S teel are available. Five different interchangeable
connection fittings can be used with each.
Models 8503 & 8504 are supplied with an NRS control valve. It features a
positive, direct mechanical means of adjusting a sliding tapered needle
which virtually prevents sticking due to foreign matter in the fluid stream.
These valves are particularly suitable for the precise control requirements in
chromatography . The flow is constant for any given stem position. Sawtoothing is eliminated. Six needles with different tapers provide a wide choice
of flow ranges for all models. Each increases capacity by an appropriate
factor of three. Needles and orifices can be changed without removing the
valve from the line. (Two different orificies are used - one for needle sizes 1-3,
another for size 4-6.)
1-2 Specifications
Needle Control Valves Models 8503 and 8504
Section 1 Introduction
Capacities and Pressure Drops
Needle Orifice (Std. cc/min.)
Taper No. Type Helium Air Water
1 300 150 4
2 Small 700 350 10
3 (0.041") 1,400 600 20
4 6,000 2,400 80
5 Larger 18,000 6,800 200
6 (0.093") 55,000 22,000 650
Capacities measured with 10 psig supply and an atmospheric
pressure exhaust. Flow capacities will vary for different gases,
liquids and pressures. Consult factory for further information.
Maximum Capacity
Maximum Operating Pressure
Brass Model: 600 psig
Stainless Steel Model: 1000 psig
Maximum Operating Temperature
Brass Model: 180°F
Stainless Steel Model: 250°F
Connections
Standard: 1/8" Female NPT - Integral
Optional: 1/8", 1/4" compression fitting; 1/4" female NPT; 1/4" ID hose type
adaptors
Dimensions
Refer to Figure 1-1
1-1
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