Series 4900 pneumatic pressure controllers combine reliable, low-emission operation with service-enhanced design. Provides control in proportional-only, proportional plus integral (reset), differential gap or transmitter modes.

• Flush-mounted internals and open design allow easy access and repair 
• Removable door
• Easy, field-reversible action
• Reduced leak paths minimize bleeding of valuable gases
• NACE MR0175-2002 compliance with optional diaphragm seals to isolate sensing element

Simple-to-operate, pneumatic pressure controller that senses pressure with a 316 SST Bourdon tube. Ideal for installations requiring rugged construction, dependable operation
and a minimum of parts.

• Control options include throttle, throttle with low-cutout, and snap
• Bourdon tube pressure ratings up to 7,500 psig
• Field-reversible controller action
• Orifice sizes to accommodate most actuators