Pneumatic Valve Positioners
The SRP series positioner can be used for controlling pneumatic valve actuators with a pneumatic control signal. Durable and dependable, it has endured the test of time, making it the most traditional of the Foxboro Eckardt positioners.
The pneumatic series positioners offer independent adjustment of zero and stroke range, along with adjustable amplification and damping effects, the user is granted full access of desired control characteristics.
Select a Pneumatic Valve Positioner
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SRP981 Pneumatic Position Transmitter |
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The Pneumatic Positioner SRP981 with pneumatic input 0.2 to 1 bar is designed to operate pneumatic valve actuators and is available in the version ATEX-constructive safety and in connection with the accessories in EEx ia / intrinsic safety. The adaptation and settings of zero an span can easily be achieved by the knurled-head screw. |
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- Stroke 8 to 100 mm (0.3 to 4.0 in), extended stroke range on request
- Angle range up to 120°
- Characteristic curves by cams
- Supply air pressure up to 6 bar (90 psig).
- Built-in pressure gauges (optional)
- Low air consumption
- Low vibration effect in all directions
- Single or double-acting
- Mounting on linear actuators according to IEC 534, Part 6 (NAMUR)
- Mounting on rotary actuators according to VDI/VDE 3845
- Protection class IP54, IP65 (on request)
- Special version with Stainless Steel housing available
- Explosion protection: ─ Basic unit: II 2 G c IIC (ATEX-constructive design) + Accessories: II 2 G EEx ia IIC acc. to ATEX─ Accessories: “Intrinsic Safety” acc. to FM and CSA
- Certificate No. 90/20226 (E2) „Lloyd’s Register of Shipping“ for use on vessels
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- Control Signal Setpoint: 0.2 to 1 bar (3 to 15 psig)
- Characteristics linear, equal-percentage or invers-equal-percentage (with cams)
- Split Range up to 4-fold possible (up to dw=0.2 bar / 3 psig)
- Zero and Span independently adjustable
- Gain and Damping independently adjustable
- Valve Action direct or reverse
- adjustable Bypass Valve Connects input w directly with output y
- Air Supply 1.4 to 6 bar (20 to 90 psig)
- Stroke Range 8 to 200 mm (0.3 to 8.0 in)
- Angle of Rotation 30 to 180 degree angle
- Protection Class IP54, optional IP 65
Electrical Classification
- Base Unit ATEX: Constructive safety II 2 G EEx c IIC T6
- Accessories ATEX: “intrinsic safety” II 2 G EEx ia IIC T6
- FM / CSA: “Intrinsic safety” Class I, Div. 1, Groups A, B, C, D
- For use on ships or vessels
- Lloyd’s registered
- Pneumatic Connection G1/8
- Electrical Connection (f. Accessories) M20 x 1.5 or 1/2-14 NPT (others with Adapter AD...)
- Ambient Temperature -40 to +80 °C (-40 to +176 °F)
- Humidity up to 100 %
- Weight 0.7 kg / 1.5 lbs (double acting: 0.9 kg / 2.0 lbs)
Options
- Inductive Limit Switches (2- or 3-wire)
- Micro switches
- Position Transmitter (4 to 20 mA)
- Manifold with staggered connection
- Gauges
- Pneumatic volume boosters
- Attachments
to linear actuators acc. to IEC 534 part 6 (NAMUR)
to rotary actuators acc. to VDI/VDE 3845
to any other linear or rotary actuator by means of extensive attachment kit offering |
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