3″-300LB-RF Piston Type Pneumatic Actuated Control Valve c/w E/P Positioner

Nominal Size 3 Inch (DN80)
Pressure Rating Class 300 LB (PN50)
Body Material Carbon Steel WCB / Stainless Steel CF8M (as required)
Flange Connection RF (Raised Face) to ASME B16.5 Class 300
Actuator Type Piston Type Pneumatic Actuator (single-acting or double-acting)
Accessories Electro-Pneumatic (E/P) Positioner, 4-20mA input signal
Application Precise flow, pressure, or temperature control in oil, gas, chemical, power, and metallurgical industries

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3″-300LB-RF Piston Type Pneumatic Actuated Control Valve c/w E/P Positioner

3″ – 300LB – RF Piston Type Pneumatic Actuated Control Valve with E/P Positioner

Technical Data Sheet

General Information

Item	Beschrijving
Kleptype	Pneumatic Actuated Control Valve / Globe Control Valve
Nominale grootte	3 Inch (DN80)
Drukclassificatie	Class 300 LB (PN50)
Lichaamsmateriaal	Carbon Steel WCB / Stainless Steel CF8M (as required)
Flange Connection	RF (Raised Face) to ASME B16.5 Class 300
Actuator Type	Piston Type Pneumatic Actuator (single-acting or double-acting)
Accessories	Electro-Pneumatic (E/P) Positioner, 4-20mA input signal
Sollicitatie	Precise flow, pressure, or temperature control in oil, gas, chemical, power, and metallurgical industries

Design & Manufacturing Standards

Standaard	Beschrijving
Valve Design Code	ANSI/ISA-75.08.01 / ASME B16.34 / IEC 60534 series
Face-to-Face Dimension	ANSI/ISA-75.08.01 / ASME B16.10
Flange Dimensions	ASME B16.5 Class 300 RF
Pressure-Temperature Rating	ASME B16.34
Lekkageklasse	FCI 70-2 / IEC 60534-4 (Class IV standard; Class V/VI optional)
Inspection & Testing	IEC 60534-4 / ANSI/ISA-75.08.01
Actuator Standard	IEC 60534-6 / ISO 5210 (mounting interface)
Positioner Standard	IEC 60534-6-1 (mounting and signal interface)
Fire Safe Design	API 607 / ISO 10497 (optional)

Main Materials (Typical – can be customized)

3.1 Valve Body Assembly

Onderdeel	Standard Material (Carbon Steel)	Optional Material (SS / Alloy)
Lichaam	ASTM A216 WCB Cast Steel	ASTM A351 CF8M (316 SS), Alloy Steel
Bonnet	ASTM A216 WCB (matching body)	ASTM A351 CF8M
Valve Plug (Trim)	ASTM A479 304/316 SS + Stellite hardfacing	316L, Hastelloy, Monel
Stoel	ASTM A479 304/316 SS + Stellite hardfacing	316L, Hastelloy, PEEK
Stang	ASTM A276 304/316 SS	17-4PH, Inconel
Stem Packing	Flexible graphite + SS spacer rings	PTFE, low emission packing (ISO 15848)
Gaskets	Flexible graphite + SS spiral wound	Metal ring gasket, PTFE
Fasteners	ASTM A193 B7 Alloy Steel (zinc plated)	ASTM A193 B8 Stainless Steel

3.2 Actuator Assembly

Onderdeel	Standard Material	Optional Materials
Cylinder Body	Cast aluminum / Carbon steel	Stainless steel
Piston	Carbon steel + chrome plating / Stainless steel	Bronze
Piston Seal	NBR / PTFE + carbon graphite	FKM, Silicone
Cylinder End Cap	Cast aluminum / Carbon steel	Stainless steel
Spring (single-acting)	Alloy spring steel	Stainless steel
Air Supply Port	G 1/4″ / NPT 1/4″	Custom

3.3 Positioner Assembly

Onderdeel	Standard Material / Specification	Optional Specifications
Positioner Housing	Cast aluminum / Engineering plastic	Stainless steel (corrosion resistant)
Input Signal	4-20 mA DC (two-wire)	0-10V, HART, Profibus PA
Air Supply Port	G 1/4″ / NPT 1/4″	—
Enclosure Protection	IP66 (standard)	IP67, Explosion-proof Ex d / Ex ia

Outline Dimensions & Weight (Typical values – may vary by manufacturer)

Dimension Parameter	Value (Typical)
Face-to-Face Length L	Approx. 295 mm (per ANSI/ISA-75.08.01)
Flange Outer Diameter D	Approx. 210 mm (ASME B16.5 Class 300)
Bolt Circle Diameter K	Approx. 168 mm
Flange Thickness C	Approx. 28 mm
Number / Diameter of Bolt Holes	8 × 22 mm
Center Height (flange face to center)	Approx. 150 mm
Overall Height (incl. actuator & positioner) H	Approx. 800 – 1,100 mm (depending on actuator size and stroke)
Valve Body Weight (excl. actuator)	Approx. 55 – 70 kg (depending on material)
Actuator Weight (reference)	Approx. 40 – 100 kg (depending on bore and stroke)

Dimensions and weights above are typical references. Final dimensions to be confirmed with manufacturer’s drawing.

Pressure-Temperature Rating (ASME B16.34 – WCB body, Material Group 1.1)

Temperature (°C)	Max. Working Pressure (bar)	Max. Working Pressure (psig)
-29 ~ 38	51.1	740
100	46.6	675
150	44.8	650
200	41.9	610
250	39.5	575
300	37.1	540
350	34.1	495
400	30.2	440
425	26.8	390

Data based on ASME B16.34 Material Group 1.1. For stainless steel bodies (Group 2.1), pressure-temperature ratings differ. Maximum allowable working pressure decreases with increasing temperature.

Performance Data

6.1 Valve Body

Parameter	Value
Drukclassificatie	Class 300 (51.1 bar @ 38°C)
Shell Test Pressure	1.5 × rated pressure (approx. 77 bar)
Seat Test Pressure	1.1 × rated pressure (approx. 56 bar)
Low-Pressure Air Seat Test	6 bar
Leakage Class (standard)	Class IV (FCI 70-2 / IEC 60534-4)
Leakage Class (optional)	Class V / Class VI (soft seat)
Flow Characteristic	Equal Percentage (EQ%) / Linear (LIN)
Flow Coefficient Cv (typical)	Approx. 100 – 150 (depending on trim and stroke)
Rangeability	50:1 (standard)
Temperature Range (standard graphite packing)	-29°C ~ +425°C
Temperature Range (low temp service)	-196°C ~ +260°C (with low temp materials)
Suitable Media	Water, steam, oil, gas, chemical media, etc.

6.2 Piston Actuator

Parameter	Value
Action Type	Single-acting (spring return) / Double-acting (no spring)
Air Supply Pressure	4 – 8 bar (6 bar recommended)
Stroke	25 mm, 38 mm, 50 mm, etc. (sized based on valve size and differential pressure)
Output Thrust (single-acting)	Depends on cylinder area and supply pressure; up to 5,000 – 50,000 N
Output Thrust (double-acting)	Depends on cylinder area and supply pressure; up to 10,000 – 100,000 N
Travel Speed	≤ 1.5 sec / full stroke (adjustable)
Explosion Proof	No electrical parts; not intrinsically explosion-proof; can be fitted with Ex accessories
Enclosure Protection	IP65 / IP67
Ambient Temperature Range	-20°C ~ +80°C (standard seals)

6.3 E/P Positioner

Parameter	Value
Input Signal	4-20 mA DC (two-wire, loop powered)
Input Impedance	Approx. 250 Ω (4-20mA)
Output Pneumatic Signal	0.2 – 1.0 bar (standard) / 0 – 10 bar (optional)
Supply Pressure	1.4 – 7 bar (depending on actuator requirement)
Air Consumption	Single-acting: approx. 5 L/min (at 0.14 MPa supply) Double-acting: approx. 15 L/min (at 0.4 MPa supply)
Linearity	≤ ±1.0% F.S.
Repeatability	≤ ±0.5% F.S.
Sensitivity	≤ 0.2% F.S.
Stroke Range	10 – 100 mm (linear valve)
Ambient Temperature Range	-20°C ~ +70°C
Enclosure Protection	IP66 (standard)
Explosion Proof (optional)	Ex d IIC T4 / Ex ia IIC T4
Communication Protocol (optional)	HART, Profibus PA, Foundation Fieldbus
Valve Position Feedback (optional)	4-20 mA position feedback signal

Belangrijkste kenmerken

Piston actuator – High output thrust, fast response; suitable for high differential pressure applications. Single-acting version with spring return provides fail-safe action (valve moves to preset safe position upon air supply loss).
High accuracy E/P positioner – Converts 4-20mA signal to pneumatic output for precise valve positioning; excellent linearity and repeatability.
Globe valve trim design – Equal percentage or linear flow characteristics available to meet various control requirements.
Hard-faced metal seat – Standard Class IV leakage; optional Class V/VI for tighter shut-off.
Blow-out proof stem – Ensures safety under high pressure.
Low emission packing (optional) – Meets ISO 15848 fugitive emission standards for environmentally sensitive applications.
High temperature and corrosion resistance – Suitable materials and packing extend service to high temperature, cryogenic, and corrosive media.
Modular accessories – Can be equipped with position feedback, limit switches, solenoid valves, filter regulators, etc., for full automation.

Fail-Safe Configuration (Single-Acting Actuator)

Action Type	Valve Position on Air Supply Loss	Valve Position on Signal Loss
Air-to-Open (ATO / FC)	Spring return → Fail Closed	Positioner output goes to zero → Valve closes
Air-to-Close (ATC / FO)	Spring return → Fail Open	Positioner output goes to zero → Valve opens
Double-acting	No spring → Fail Lock (holds last position)	Depends on positioner configuration

Note: Valve position on signal loss depends on the positioner configuration (single-acting positioners typically output zero signal, causing the valve to return to the spring-set position).

Optional Accessories

Accessory	Beschrijving
Air Filter Regulator	Cleans and stabilizes air supply pressure
Solenoid Valve	Provides emergency shut-off or remote on-off control
Position Transmitter / Limit Switches	Provides 4-20mA position feedback or dry contact signals
Lock-up Valve	Maintains valve position upon air supply failure
Pneumatic Booster	Increases response speed for high flow applications
Manual Override (Handwheel)	Allows manual operation when power/air is lost

Ordering Information

Please provide the following when ordering:

Valve specifications – Size (3″), pressure rating (Class 300), connection (RF)
Body material – WCB / CF8M / other alloy
Trim material & hardness – Plug and seat material (Stellite hardfacing, etc.)
Flow characteristic – Equal percentage / Linear
Leakage class – Class IV / V / VI
Actuator – Single-acting (ATO/ATC) or double-acting; supply air pressure
Positioner specifications – Input signal (4-20mA), explosion-proof rating, communication protocol, enclosure protection
Accessories required – Filter regulator, solenoid valve, limit switches, handwheel, etc.
Process conditions – Media name, temperature, pressure, differential pressure, flow range
Special requirements – NACE MR0175 for sour service, low emission packing (ISO 15848), third-party inspection (BV, DNV, TÜV, etc.)

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