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Globe Control Valve - Pneumatic0 pages
Sizes:
Materials:
Model:
Stem Seal:
Valve Seal:
Specifications
1/2" – 4"
PVC, PP, PVDF and PTFE
Flanged (ANSI)
PTFE Bellows
FKM,, EPDM, PTFE encapsulated
FKM
Flow Char.: Linear or equal percentage
Rangeability: 1: 50 for 1/2" – 3", 1: 30 for 4"
Temp. Range: PVC 32– 140º F, PP -5 – 175º F
PVDF -5 – 265º F, PTFE -5 – 284º F
Pneumatic Globe Control
Standard Features (Sizes 1/2" - 4")
• Precise flow control
• t Solid thermoplastic valve body provides excellent
t corrosion resistance
• PTFE bellows stem seal eliminates old style
t packing glands and minimizes maintenance
•t Positive bubble-tight shut-off
• tPlug and seat can be changed to accommodate
t a variety of valve coefficients (Cv)
• t Plug (trim) can be characterized (linear or
t equal percentage) per requirements. (See below)
• t No metal to media contact
• t Extremely corrosion resistant actuator
t constructed of glass-filled polyester (PEG) with tt
t stainless steel trim
• t Maximum required air pressure is 90psi
• t 3-15psi direct acting for sizes up to 1"
Options
•
•
•
•
Parts List (Sizes 1/2" – 4")
PARTS
Description
PCS.
MATERIAL
1
Pneumatic Actuator
1
Polyester Glass Filled (PEG)
2
Actuator Spring
1
Coated Steel
3
Diaphragm
1
BUNA-N (Nitrile)
4
Actuator Valve Stem
1
316 Stainless Steel
5
Air Connection
1
1/4" FNPT
6
Actuator Standoffs
2
316 Stainless Steel
7
Position Indicator
1
Nylon Coated Steel
8
Bellows Seal O-Ring
1
9
Bellows Housing
1
10
Body O-Ring
1
11
Bellows
1
12
Seat O-Ring
1
EPDM, FKM, PTFE
Encapsulated FKM
13
Valve Seat
1
PVC, PP, PVDF, PTFE
14
3-15psi pneumatic positioner
4-20 mA electro-pneumatic positioner
4-20 mA output transmitter
Extra (auxiliary) limit switches
NO.
Valve Plug
1
PVC, PP, PVDF, PTFE
15
Valve Body
1
PVC, PP, PVDF, PTFE
EPDM, FKM, PTFE
Encapsulated FKM
EPDM, FKM, PTFE
Encapsulated FKM
EPDM, FKM, PTFE
Encapsulated FKM
PTFE
Sample Specification
All thermoplastic modulating control valves shall be of the
globe valve design. Valves shall have interchangeable seat
and plugs to accommodate various flow coefficients (Cv)
and flow characteristics shall be either linear or equal
percentage. Stem seal shall be PTFE and of the bellows
design. Pneumatic actuator shall be constructed of glassfilled polyester (PEG) with stainless steel trim. Actuator
shall have 1/4" FNPT air connections and a visual
position indicator. PVC shall conform to ASTM D1784 Cell
Classification 12454-A, PP conforming to ASTM D4101
Cell Classification PP0210B67272, and PVDF conforming
to ASTM D3222 Cell Classification Type II, and PTFE shall
conform to PTFE TFE 1600, as manufactured by Asahi/
America, Inc.
ASAHI/AMERICA RECOMMENDS THE USE OF AV GASKETS FOR
THIS PRODUCT LINE
Caution
• Never remove valve from pipeline under pressure.
• Always wear protective gloves and goggles.
www.asahi-america.com • asahi@asahi-america.com • Tel: 800-343-3618 • 781-321-5409 • Fax: 800-426-7058 2
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