Product Features:
1.Soft-Seated Design: The floating seat rings & gate can achieve automatic sealing by pressure and double block of upstream & downstream valve seat. Soft-seated design ensures “bubble tightness” sealing and self-cleaning. Floating seat rings always closely contact the gate. The sealing surface is well protected to prolong its service life.
2.Double Block Design: When the valve is in the closed position with equal or no pressure, both spring loaded seats can shut off the pipeline. When the pipeline pressure is applied, the pressure forces the slab gate to float against the downstream seat and form the tight sealing. At the same time, the upstream pipeline pressure forces the upstream valve seat on the slab gate to form the upstream sealing.
3.Self Relieving Cavity: Double block and bleed slab gate design may cause the cavity pressure to increase due to thermal expansion when in the closed position. When the cavity pressure exceeds the pipeline pressure, the seat is forced away from the gate surface allowing the excess cavity pressure to drain into the pipeline, which achieves the pressure balance between the body cavity and the pipeline.
4.Secondary Sealant Injection System: 6"" and larger valves will be with a secondary sealant injection fitting for the stem and seats. If the seat inserts or stem O-rings are damaged, the leakage from the seat and stem can be prevented injecting sealant into the fitting.
5.Gasket of Bonnet Flange: Unless otherwise stated, KAMROO provides stainless steel + graphite spiral wound gasket for bolted bonnet globe valve pressure rating Class 150-Class 600, and octagonal ring joint for bolted bonnet globe valve pressure rating Class 900 and above as standard. Pressure sealing bonnet design are usually used for valve pressure rating Class 900 and above, such pressure sealing design makes the valve as to pressure seal bonnet, the commonly used material for its gasket is steel ring, graphite is also available as an option.
6.Sealant Injection: In normal condition, stem sealing is not achieved with sealing grease. Sealing grease can be injected through injection port for urgent repair in the event that stem sealing is failed due to one or another reason. Each sealant injection port is installed an injection valve and an underground non-return check valve. The typical injection valve has a helmet to secure its safety and reliability. There is a buckle designed at the head of injection valve for fast injection.
7.Drain Port: Drain port is installed on the bottom of valve body, valve can be vented or drained through drain port. The drain port can be an insulation valve or a special plug, which is safe and convenient.
8.Over-Pressure Release of Valve Cavity: The over-pressure of valve cavity is released automatically to upstream through seat ring, thus relief device of over-pressure in body cavity is not required. When the valve is fully closed, the upstream and downstream pressure will be blocked by valve seats, and then the valve can be vented or drained.
