SiemensLinear Actuators
Siemens Pneumatic Actuator: Rotary, 8 psi to 13 psi Spring Range, Extended Shaft Mounting
The Siemens Pneumatic Actuator: Rotary (SKU 878FF7, MPN 331-4821) is a linear actuator with a pivot connection, designed for fire and smoke applications. It features an 8 psi to 13 psi spring range, extended shaft…
SKU 3G-OTH-67679
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore
Product Description
The Siemens Pneumatic Actuator: Rotary (SKU 878FF7, MPN 331-4821) is a linear actuator with a pivot connection, designed for fire and smoke applications. It features an 8 psi to 13 psi spring range, extended shaft mounting, and a 2 3/4 in stroke. No positioner is included.
Used in
Common applications for SiemensDistrict cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks
Siemens Products
3G Electric supplies Siemens linear actuators. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
