Line pressure and heavy spring hold disc firmly against the body seat, sealing off the flow. When operated, the disc slides across the body seat pushing harmful boiler scale away, and wiping clean the precision lapped surfaces.
Hand adjustment of the post packing is eliminated, Post packing is self-adjusted by a spring and line pressure. This prevents destructive errosion and leakage of stuffing box.

Line pressure and heavy spring hold disc firmly against the body seat, sealing of the flow. When operated, the disc slides across the body seat pushing harmful boiler scale away, and wiping clean the precision lapped surfaces.

Hand adjustment of the post packing is eliminated. Post packing is self-adjusted by a spring and line pressure. This prevents destructive erosion or leakage of stuffing box.

Features

• Valve can be installed with hand wheel in any position.
• Straight-through-flow.
• Leak proof seal-disc has self lapping action, actually improves with use.
• Seal-disc has self wiping action; cannot hang-up on boiler scale.
• No retightening after cool down; seal not affected by temperature change.
• Real slow opening.
• Hard seat resists erosion.

A new combination of quick and slow opening Valves in one body operates the same as 4000 Series.The lever operated section is the blowing Valve. The blowing Valve can be removed for repair while the sealing Valve remains in service (Fire Banked).
All Valve bodies are made of carbon steel and are easy to operate at max mum blow-off pressure.

These valves are of the outside Screw and Yoke type. The seat and disc are capable of withstanding the severe erosive flow of blow-down service. While quick opening Valve holds boiler water, the seat and disc can be easily removed for repair without removing the Valve from line.