What is the difference between rising stem and non-rising stem gate valves?

A rising stem gate valve (OS&Y) has a stem that visibly rises above the handwheel when opened, providing a clear visual indicator of valve position — ideal for above-ground industrial applications. A non-rising stem gate valve (NRS) has the stem threads inside the valve body with no external stem movement, making it compact for underground installations and limited vertical space applications such as buried water mains and utility services.

What are gate valves used for?

Gate valves are used for full open / full close isolation in pipelines where minimal pressure drop is required. Common applications include: oil & gas trunk pipelines, water distribution mains, fire protection systems, power plant steam lines, refinery process units, chemical plants, and shipboard piping. Gate valves excel in straight-line flow with minimal restriction and are designed for infrequent operation.

Can a gate valve be used for throttling?

No, gate valves are not recommended for throttling. When operated in partially open positions, the high-velocity fluid flow across the gate and seat causes erosion, vibration, and premature seat damage. Use a globe valve or control valve for throttling applications. Gate valves should always be used in the fully open or fully closed position.

What materials are TANGGONG gate valves available in?

TANGGONG gate valves are available in cast carbon steel (WCB), chrome-moly alloy steel (WC6, WC9), cast stainless steel (CF8/SS304, CF8M/SS316, CF3/SS304L, CF3M/SS316L), forged carbon steel (A105), forged stainless steel (F304, F316), ductile iron, and specialty alloys upon request. Seat options include metal-to-metal, resilient seated (EPDM, NBR), and stellite hard-faced for high-temperature service.

What is the lead time for gate valve orders?

Standard gate valve orders are typically delivered within 3–7 business days for in-stock items. Custom or large-scale orders typically require 4–8 weeks depending on specifications, materials, and quantity. Contact our sales team with your datasheet for an accurate delivery schedule.

API Chrome-Molybdenum Steel Gate Valve

Name: TANGGONG Industrial Gate Valve Series
Brand: TANGGONG VALVE GROUP
Availability: InStock

Design and manufacturing: API600
The structural length: ASME B16.10
Connection forms: ASME B16.5
Inspection and test: API598
Caliber: 1/2"~36"
Pressure temperature level: ASME B16.34
Drive mode: Manual, worm gear, pneumatic, electric,hydraulic etc
Pressure: Class 150~Classs2500

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Product Detail

API Gate Valve refers to gate valves manufactured in strict accordance with American Petroleum Institute (API) standards, mainly API 6D and API 600. As internationally‑used high‑pressure industrial gate valves for the petroleum, chemical and energy industries, they feature high strength, high pressure resistance, corrosion resistance and zero‑leakage performance, suitable for severe working conditions.

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