Why are stop valves suitable for throttling, while gate valves are not?

The core concept can be summed up in one sentence: The stop valve is like a faucet, allowing you to control the flow of water precisely by adjusting the opening degree; the gate valve is like a door, either fully open or fully closed; when it is partially open or closed, the water flow will "scrape" and damage the sealing surface of the gate plate. The figure above has already shown the structural comparison between the two. The flow channel of the stop valve on the left is S-shaped (the fluid changes direction, which is itself a throttling principle), while the flow channel of the gate valve on the right is straight-through (the fluid does not turn, and the gate plate is suspended in the middle and is subject to erosion and vibration). Selection rule: Use a stop valve for throttling and regulating; use a gate valve for full opening and full closure.

How to evaluate valve manufacturers?

The product's execution standards, pressure ratings and material ranges, valve body and internal component traceability, pressure and sealing test documents, flow direction and installation requirements, similar medium experience, and after-sales responsibilities should all be verified. The supplier should also provide a written confirmation of the selection based on the medium, temperature, pressure difference, diameter and regulation requirements.

What are the characteristics of stop valves and in which situations are they applicable?

The stop valve achieves cutting or regulation by the movement of the valve disc along the axis of the valve seat. It usually has good throttling characteristics, but the flow channel turns will result in higher pressure loss compared to the straight-through type valve. It is commonly used in steam, process media and pipelines requiring certain flow regulation; the specific structure, materials and flow direction should be determined according to the working conditions.

JIS 10K Japanese standard flange globe valve SCS13/SCS14/SCPH2

Name: JIS 10K Japanese standard flange globe valve SCS13/SCS14/SCPH2
Brand: Tekron
SKU: SCS13/SCS14/SCPH2

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Home > Valve Types > Globe valve

JIS 10K Japanese standard flange globe valve SCS13/SCS14/SCPH2

Series and material options

This is a manually operated flanged globe-valve series with SCS13, SCS14 or SCPH2 body options. These are distinct grades; select the body, trim and seat for the actual fluid and conditions. SCPH2 should not be mistranslated as CHPH2 or SCCH2.

Operation and stem arrangement

The stem mechanism moves the closure member towards or away from its seat. OS&Y and NRS describe different stem arrangements and must not be presented as one identical construction. Confirm the selected arrangement, travel and operating clearance on the drawing.

Rating and tests

JIS 10K is a class designation, not a universal 16 bar working limit or a fixed 18 bar test requirement. Operating limits and tests depend on the material, temperature, construction and applicable standards agreed for the supply.

Flow direction and installation

Follow the body arrow and the actual manual. Do not reverse the flow solely because the valve exceeds a generic size threshold; DN150 must not be equated to NPS16. Seat forces, stem loading, orientation and suitability for throttling require review of the selected design.

Drawings and dimensions

The reference pictures below do not establish that every pictured stem arrangement is supplied together. Confirm the applicable flange, face-to-face dimensions, selected stem construction and inspection documents before ordering.

JIS 10K flanged globe valve, SCS13/SCS14/SCPH2

Enquiry and technical documents

Provide fluid composition, normal and maximum pressure and temperature, flow, size, connections and operating requirements. Verify the selected data sheet, assembly drawing, material documents and agreed tests; do not transfer ratings from a different product.

This product belongs to our Globe valve range. For sizing, pressure rating, material and actuator selection, see our valve technical resources.

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