Foxboro SRP981-CIRNFDZ7NASL Positioner

Foxboro SRP981-CIRNFDZ7NASL Pneumatic Positioner

The SRP981 Positioner is designed to control pneumatic valve actuators with pneumatic control signals.It is used to reduce the adverse effects of valve friction, for higher thrust and shorter positioning time.It offers an easy adjustment by two mechanical screws.For complete specification, refer to Product Specification Sheet PSS EVE0101 A-(en)
g  Independent adjustment of stroke range and zero
g  Adjustable amplification and damping
g  Split range up to 4-fold possible
g  Input Signal from 0.2 … 1 bar (3 … 15 psig)
g  Supply pressure up to 6 bar (90 psig)
g  Single or double acting
g  Low vibration effect in all directions
g  Mounting on linear actuators according to NAMUR:
IEC 534 Part 6 
Stroke range 8 to 100 mm (0.3 to 4 in) 
(larger strokes on request)
g  Mounting on rotary actuators acc. to VDI/VDE 3845 for 
rotation angles up to 120°
• Angular range 
 linear: 30° to 120° 
 equal percentage: 90°; linear from 70°
g  Ambient temperature –40 to 80°C (–40 tp 176°F)
g  Protection class IP54 or IP65
g  Explosion protection: 
II 2 G EEx c (constructive safety) + Accessories in 
II 2 G EEx i according to ATEX
g  Stainless Steel housing (optional)
g  Additional Inputs/outputs (optional):
• Position feedback 4 to 20 mA
• Built-in independent inductive limit switches 

(2-/3-wire) or micro switches

Foxboro SRP981-CIRNFDZ7NASL Pneumatic Positioner

g  Accessories
• Booster relay to minimize stroke time
• Lock-in relay (in case of lost air supply)
• Gauge Manifold
g  Gauges (optional)
• External gauge manifolds
• Integrated gauges 
 Indicating ranges: 
 Input 0 to 1.6 bar (0 to 23 psig) 
 Output 0 to 10 bar (0 to 150 psig)
Input
Signal range. . . . . . . . . . . . . . 0.2 to 1 bar (3 to 15 psig) or 
split range down to 
Δw 0.2 bar (3 psi)
Response characteristic
Amplification. . . . . . . . . . . . . . adjustable
Sensitivity. . . . . . . . . . . . . . . . . <0.1% F.S.
Non-linearity 
(terminal based adjustment) <1.0% F.S.
Hysteresis. . . . . . . . . . . . . . . . <0.3% F.S.
Supply air dependency. . . . . <0.3% / 0.1 bar (1.5 psi)
Temperature effect. . . . . . . . <0.5% / 10 K
Mechanical vibration
10-60 Hz up to 0.14 mm,
60-500 Hz up to 2 g. . . . . . <0.25% of travel span

Foxboro SRP981-CIRNFDZ7NASL Pneumatic Positioner

Supply 
Supply air pressure. . . . . . . . 1.4 to 6 bar (20 to 90 psig)
Supply air. . . . . . . . . . . . . . . . . free of oil, dust, water 
according to IEC 654-2
Connection
Pneumatic. . . . . . . . . . . . . . . . Female threads G 1
⁄8 acc. 
to ISO 228
Materials
Base plate. . . . . . . . . . . . . . . . Aluminum (Alloy No. 230) 
finished with DD-varnish
All moving parts of:
feedback system. . . . . . . . .1.4305/1.4571
mounting bracket. . . . . . . . 1.4301

Foxboro SRP981-CIRNFDZ7NASL Pneumatic Positioner

Foxboro SRP981-CIRNFDZ7NASL Pneumatic Positioner

If you have any interest, pls feel free to contact me as below
Jackie Ma
HONGKONG XIEYUAN TECH CO., LIMITED
Add:7-A16,Caishen Commercial Plaza,Hangkou Railway Station,Wuhan, China
M:86-15717178751(WhatsApp & Telegram) | T:+86-27-85887732 | F:86-27-85309780 
Email:Jackie@hkxytech.com