Model WG-D Pneumatic Diaphragm Actuator
The Model WG-D Pneumatic Diaphragm Actuator is commonly used on reverse acting gate valves and is suitable for all types of applications and environments.
Features –
- Easy to install
- Lightweight and compact
- No special tools required
- Designed for long service life
- Non-stainless components are coated with Xylan to protect against harsh marine environments
- Shims allow permanent drift adjustment
- Aluminum bronze used for seal nut and diaphragm nut to minimize wear
- Designed for safety
- Valve body penetration is on bonnet above backseat allowing monitoring of backseat and venting well pressure trapped below packing
- Heavy-duty compression spring ensures stem backseat at low pressure
- Bonnet-to-stem, metal-to-metal fire safe backseat protects against bonnet packing distortion or damage in the event of fire
- Packing retainer has wear bearings that prevent metal-to-metal contact with bonnet stem
- If pressure is present in the diaphragm case when the seal nut is backed off during servicing, the seal nut will vent pressure to atmosphere warning the technician of an unsafe condition
- Top shaft seals can be replaced without removal or adjustment of the top shaft or top diaphragm case
- Top shaft is free-floating thereby eliminating torque transfer when using manual hold-open device
- Top shaft indicates position of gate valve
- The WG-D meets NACE MR-01-75
- Gas reservoir to store air pressure for operations
