Key Parameters & Specifications
Parameter / Feature Category Description
Product Name Fisher™ RSS Reduced Section Control Valve
Type Top-Entry, Sliding Stem, Post-Guided, Flangeless Body Globe Valve
Primary Function Throttling (Modulating) Control for general-purpose process applications.
Body Style Globe Body with a straight-through flow pattern.
Size Range ½ inch to 6 inches (DN 15 to DN 150)
Pressure Rating (ANSI) Class 150, 300, 600
End Connections Flangeless (Reduced Section). Requires separate companion flanges for installation between ANSI-rated pipeline flanges.
Trim Post-Guided Plug. The plug is stabilized by a single guide post, providing adequate stability for general service.
Leakage Class ANSI Class IV (standard metal seat). ANSI Class VI (bubble-tight shut-off) is available with a soft seat.
Flow Characteristics Equal Percentage or Linear (determined by the contour of the plug).
Temperature Range Standard: -20°F to 450°F (-29°C to 232°C). Extended ranges available with special materials.
Actuator Compatibility Designed to be paired with Fisher pneumatic spring-and-diaphragm actuators (e.g., 585C series) and a positioner (e.g., a Fisher 480).
Specifications:
Models: D (Double-Acting), DA (Spring-Return)
Type: Piston Actuator, Scotch-Yoke design
Action: Double-Acting (D) / Spring-Return (DA)
Standard Travel: 90° quarter-turn (standard), 180° available for the D model.
Mounting: Directly onto standard ISO 5211 mounting pads.
Air Supply & Performance:
Air Supply Pressure Range:
D (Double-Acting): 2.8 to 8.6 bar (40 to 125 psig)
DA (Spring-Return): 3.4 to 8.6 bar (50 to 125 psig) [Air pressure must overcome spring force]
Ambient Temperature Range: -20° to 85°C (-4° to 185°F) with standard lubricant.
Stroking Speed: Very fast, typically 1-2 seconds for 90° travel, depending on air supply and piping.
Torque Output:
Output: Torque output is a function of air supply pressure and actuator size. The DA model's torque varies between the air-side and spring-side of the stroke.
Example Torque (for Size 30 @ 6.9 bar/100 psig):
D Actuator: Approximately 70 Nm (50 lb-ft) at both ends of the stroke.
DA Actuator: ~100 Nm (75 lb-ft) on the air end, ~60 Nm (45 lb-ft) on the spring end.
Physical Data (Typical for Size 30):
Body Material: Hard Anodized Aluminum
Piston Rod & Yoke: Hardened Steel
Weight: Approximately 5.4 kg (12 lbs) for the DA model.
Accessories & Options:
Positioners: Fisher FIELDVUE™ DVC6000 or other digital positioners can be mounted for precise modulating control.
Limit Switches: Proximity or mechanical switches to indicate valve position.
Solenoid Valves: Used for direct electrical control, essential for on-off and ESD applications.
Air Filter Regulators: To clean and regulate the air supply.
Manual Override: Optional handwheel for manual operation.
Specifications:
Model: FB Pressure Regulator
Type: Pilot-Operated
Functions: Pressure Reducing, Backpressure Control, Relief
Sizes & Connections:
Valve Size: 1" to 8" (DN 25 to DN 200)
Pressure Class: ANSI 125, 150, 300, 600
End Connections: Flanged (RF, RTJ)
Performance & Ratings:
Pressure Rating (Example):
ANSI 150: 275 psi (19 bar) @ 100°F (38°C)
ANSI 300: 720 psi (50 bar) @ 100°F (38°C)
Temperature Range: -20° to 450°F (-29° to 232°C) [Standard; special packs available for extended range]
Set Pressure Range: Varies widely based on the specific pilot and spring combination.
Accuracy (Droop): High, typically 2% to 5% of the set point.
Flow Coefficient (Cv): High Cv values. Specific values are determined by valve size and trim.
Pilot Options:
Proportional Pilot: Standard for most pressure reducing and backpressure applications.
Bleed Pilot (Unloader): For applications with unstable loads or specific cycling requirements.
Solenoid Stop Pilot: Allows for remote shutoff of the regulator.
Dome-Loaded Pilot: Uses an external air supply for very precise set point control.
Materials of Construction:
Body: Carbon Steel (WCB) [Standard], Stainless Steel (CF8/CF8M), Ductile Iron.
Trim (Plug, Seat): 316 Stainless Steel (standard), with optional hardened trim for erosive service.
Specifications:
Model: FB Pressure Regulator
Type: Pilot-Operated
Functions: Pressure Reducing, Backpressure, Relief
Sizes & Connections:
Valve Size: 1" to 8" (DN 25 to DN 200)
Pressure Class: ANSI 125 through 600
End Connections: Flanged (RF, RTJ)
Performance & Ratings:
Pressure Rating: Dependent on body class (e.g., for ANSI 150: 275 psi; for ANSI 300: 720 psi).
Temperature Range: -20° to 450°F (-29° to 232°C) [Standard; special packs extend range]
Set Pressure Range: Varies widely based on the specific pilot and spring used.
Accuracy: High, with droop as low as 2-5% of the set point depending on the pilot.
Pilot Options:
Proportional Pilot: Standard for most pressure reducing and backpressure applications.
Blind Pilot: For applications where the pilot does not need to sense a remote signal.
Solenoid Stop Pilot: Allows for remote shutoff of the regulator.
Dome-Loaded Pilot: For very precise set point control using an external air supply.
Materials of Construction:
Body: Carbon Steel (WCB) [Standard], Stainless Steel (CF8/CF8M), Ductile Iron.
Trim (Plug, Seat): 316 Stainless Steel (standard), with optional hardened trim for erosive service.
Diaphragm: Nylon-reinforced elastomer.
Specifications:
Valve Size: 1/2" to 2" (DN 15 to DN 50)
End Connections: NPT (National Pipe Taper)
Pressure Rating: 275 PSIG (19 bar) @ 100°F (38°C)
Temperature Range: -20° to 400°F (-29° to 204°C) [Dependent on seat material]
Performance & Flow Characteristics:
Shut-Off Class: ANSI Class VI (Bubble-tight)
Flow Characteristic: Equal Percentage (inherent)
Rangeability: Up to 100:1
Flow Coefficient (Cv): Ranges from approximately 5 to 50, depending on valve size and V-notch angle.
Materials of Construction:
Body: 316 Stainless Steel (standard), Carbon Steel
Ball: 316 Stainless Steel
Shaft: 316 Stainless Steel
Seat: RPTFE (Reinforced PTFE)
Actuator & Accessories:
Actuator Types: Compatible with a wide range of compact Fisher and other rotary actuators due to its low torque.
Pneumatic: Fisher 1051/1052 SRD (small sizes), Fisher 1053/1054, and other compact piston actuators.
Electric: Electric Motor Actuators.
Positioner: A Fisher FIELDVUE™ DVC6000 or other compact positioner can be mounted for precise modulating control.
Specifications:
Model: 2100 Safety Relief Valve
Type: Conventional Spring-Loaded, Full Nozzle
Design Standard: ASME Boiler and Pressure Vessel Code, Section VIII
Sizes & Connections:
Valve Size (Inlet): 1" x 2" through 4" x 6" (common inlet x outlet sizes)
Orifice Designations: D through T (per ASME/API standards)
End Connections: Flanged (RF, RTJ) standard. Other connections available.
Pressure Class: ANSI 150 through 2500
Performance & Ratings:
Set Pressure Range: Varies by spring and valve design, typically from around 15 psig to over 1000 psig.
Temperature Range: -20° to 800°F (-29° to 427°C) [Dependent on materials]
Overpressure: Standard setting is 3% for steam/gas and 10% for liquid (per ASME code).
Blowdown: Adjustable, typically 2-7%.
Backpressure: Limited built-in backpressure capability. A balanced bellows design is available as an option for applications with significant backpressure.
Materials of Construction:
Body: Carbon Steel (WCB) [Standard], Stainless Steel (CF8/CF8M), Alloy Steels (WC6, WC9).
Nozzle & Disc: Typically 316 Stainless Steel. Hardened trim (Stellite) is available for erosive or high-pressure services.
Spring: Chrome Vanadium Steel.
Specifications:
Models: L2 (Single-Acting, for Inlet Control), L2sj (Double-Acting, for Outlet Control)
Type: Pilot-Operated Float Level Controller
Operation: Mechanical / Pneumatic (Self-Contained)
Process Connections & Mounting:
Cage Size: Standard displacer cage lengths from 14 in to 120 in (355 mm to 3048 mm).
Process Connection: Typically 2-inch or 3-inch NPT or flanged cage connections.
Mounting: Internal cage, external cage, or bridle mounting.
Pilot & Supply Pressure:
Supply Pressure Range: 35 to 150 psig (2.4 to 10.3 bar)
Pilot Output Pressure: Varies based on supply pressure and float position, used to actuate the main control valve.
Materials of Construction:
Cage/Body: Cast Iron (standard), Ductile Iron, Carbon Steel, Stainless Steel.
Float: Stainless Steel.
Internal Parts: Stainless Steel and Brass.
Performance & Sizing:
Control Sensitivity: Highly dependent on float size, lever arm length, and supply pressure.
Capacity: The controllers themselves do not have a flow capacity (Cv). They are sized based on their ability to pilot and control a separate main control valve, which is selected based on the required flow rate.
Specifications:
Valve Size: 3" to 12" (DN 80 to DN 300)
Pressure Class: ANSI 150
End Connections: Wafer, Lugged
Temperature Range: -20° to 400°F (-29° to 204°C) [Dependent on seat material]
Performance & Flow Characteristics:
Shut-Off Class: ANSI Class VI (Bubble-tight)
Flow Coefficient (Cv): High Cv values. Specific values depend on valve size.
Pressure Rating: 150 psi (10.3 bar) saturated steam; 275 psi (19.0 bar) for water, oil, and gas.
Materials of Construction:
Body: Ductile Iron (epoxy coated standard), Carbon Steel, Stainless Steel
Disc: 316 Stainless Steel (standard)
Stem: 17-4PH Stainless Steel (standard)
Seat: Resilient materials such as Buna-N (Standard), EPDM, or Viton® for different fluid compatibilities and temperature ranges.
Actuator & Accessories:
Actuator Types:
Pneumatic: Fisher 1051/1052 SRD spring-return and double-acting piston actuators, 657/667 spring-diaphragm actuators.
Electric: Electric motor actuators.
Positioner: A Fisher FIELDVUE™ DVC or other rotary positioner can be mounted for precise modulating control.
Accessories: Limit switches, solenoid valves, filter regulators, etc.
General Specifications:
Model: 3620JP Pilot-Operated Safety Relief Valve
Design Standard: JIS B 8210
Operation Type: Pilot-Operated
Main Valve Specifications:
Valve Size: Larger JIS sizes to handle higher flows (e.g., 80A, 100A, 125A, 150A, 200A).
Pressure Rating: JIS high-pressure classes (e.g., 16K, 20K, 30K, 40K, 63K).
End Connections: JIS Flanges (e.g., JIS 20K, 30K RF flange facing).
Orifice Area: Larger orifice sizes to meet high-capacity demands.
Pilot Specifications:
Pilot Types:
Standard Pilot: For general steam and gas service.
Balanced Piston Pilot: For applications with high or variable backpressure.
Liquid Service Pilot: For liquid applications.
Set Pressure Range: Capable of higher set pressures compared to the 3610JP series.
Performance Characteristics:
Accumulation (Overpressure): Typically 3% for steam (per JIS B 8210).
Blowdown: Adjustable.
Backpressure Capability:
Standard: Limited built-in backpressure capability.
Balanced: Can handle high levels of variable backpressure (e.g., up to 50% or more of inlet pressure) when equipped with a balanced pilot.
Materials of Construction:
Main Valve Body: SCPH 2 Cast Steel (Standard), with options for higher grades like SCPH 32 for high-temperature service.
Internals (Piston, Seat): Stainless Steel with optional hardened trim for erosive services.
Pilot: Stainless Steel and Brass.