China Customized Rising Stem Gate Valves Suppliers - Low Price Rising Stem Gate Valves

Gate Valves: Rising Stem Gate Valves (OS&Y)

Heavy-Duty Rising Stem Gate Valves for Water Supply, Utility, and Industrial Piping Networks

OS&Y Rising Stem Gate Valve
OS&Y (Outside Screw and Yoke) Rising Stem Gate Valves are engineered for heavy-duty on/off isolation in high-pressure steam, oil, gas, and chemical lines. By keeping the stem threads outside the flow passage, the operating mechanism is
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Rising Stem Stainless Steel Gate Valve
The Rising Stem Stainless Steel Gate Valve delivers zero-leakage isolation in demanding industrial piping systems. Manufactured to API 600 and ASME B16.34 standards using certified CF8, CF8M, or duplex alloys, it features an unobstructed
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Rising Stem Cast Steel Gate Valve
The Rising Stem Cast Steel Gate Valve provides a full-bore isolation solution for demanding industrial fluid lines. Built to handle heavy pressure and thermal cycles, this valve utilizes a linear vertical wedge to achieve tight shut-off
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Rising Stem Flanged Gate Valve
The Rising Stem Flanged Gate Valve features an outside screw and yoke (OS&Y) design that moves the stem vertically during operation, providing field operators with instant visual verification of valve position. Built with standardized
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Rising Stem Resilient Seated Gate Valve
The Rising Stem Resilient Seated Gate Valve provides leak-tight isolation for pressurized water, wastewater, and utility pipelines. It features an external threaded stem that moves vertically with the handwheel, offering clear, physical
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Rising Stem Wedge Gate Valve
The Rising Stem Wedge Gate Valve provides absolute fluid shut-off and direct visual position monitoring for critical piping isolation. Operating via an Outside Screw and Yoke (OS&Y) mechanism, the stem rises outside the valve body as the
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Product Overview

Rising Stem Gate Valves (OS&Y) deliver reliable fluid isolation and minimal flow resistance across pipeline networks. The external threaded stem rises alongside the gate during operation, providing immediate visual verification of valve position. When fully open, the gate lifts completely clear of the flow path to preserve system pressure and flow capacity. Engineered for durability and zero leakage, our rising stem gate valve range serves municipal water supply, industrial processing, and infrastructure projects worldwide.

Key Features of Rising Stem Gate Valves

Visual Position Verification

The rising stem provides quick, visible confirmation of valve status from a distance.

Full-Bore Flow Efficiency

Straight-through passage eliminates internal obstruction, maintaining full flow capacity with minimal pressure drop.

Bi-Directional Sealing

Available with resilient or metal seats to ensure reliable shut-off in either flow direction.

Isolated Stem Threads

External stem threads stay clear of internal media, preventing corrosion and extending service life.

Standardized Actuation

Built with universal mounting flanges for easy fitting of handwheels, bevel gearboxes, or electric actuators.

Technical Specifications

Product Type	OS&Y Rising Stem Gate Valve Series
Size Range	DN50 – DN1200 / 2" – 48"
Pressure Class	PN10, PN16, PN25, PN40 / Class 150, Class 300
Body Materials	Ductile Iron (EN-GJS-450-10), Cast Iron (GG25), Carbon Steel (WCB), Stainless Steel (CF8/CF8M)
Gate / Seat	Ductile Iron EPDM Encapsulated (Resilient) or Stainless Steel / Stellite Hard Facing (Metal)
Stem Material	Stainless Steel 410 / 304 / 316 / Duplex Steel
End Connections	Flanged (EN 1092-2, ASME B16.5, BS 4504), Groove Ended, Butt-Weld
Design Standards	API 600, API 6D, EN 1171, DIN 3352, BS 5163, ASME B16.34
Testing Standards	API 598, EN 12266-1
Temperature	-20°C to +400°C (Subject to seal and trim configuration)

Available Configurations

Resilient Seated (Soft Seal)
Fully encapsulated EPDM or NBR wedges deliver zero-leakage sealing and smooth flow, designed specifically for clean water, wastewater, and irrigation systems.

Metal Seated (Hard Seal)
Precision-ground stainless steel or Stellite surfaces endure higher temperatures, abrasive particles, and harsh industrial media.

Flanged Connection
Standardized flange dimensions ensure rigid alignment, leak-tight installation, and straightforward inline maintenance.

Gearbox Driven
Heavy-duty bevel gear operators reduce manual operating torque on large-diameter valves or high-differential-pressure lines.

Electric Actuated
Direct-mount electric actuators enable remote control and system integration into automated plants and SCADA networks.

How It Works

A Rising Stem Gate Valve uses a threaded stem attached to a wedge gate. Rotating the handwheel turns the stem nut, raising or lowering the stem and gate along internal body guides.

Opening the valve lifts the gate completely clear of the flow passage. Closing it drives the wedge down against the body seats to form a tight seal. Because the gate moves perpendicular to the fluid flow, gate valves are designed for full-open or full-closed isolation rather than flow throttling.

pApplications of Rising Stem Gate Valves

01/

Municipal Water Networks: Provides line isolation across water distribution mains, pump stations, and treatment plants.

02/

Wastewater Treatment: Handles treated effluent, sludges, and utility isolation with easy-to-maintain components.

03/

Industrial Piping: Manages cooling water, utility lines, and process fluids in chemical and power facilities.

04/

HVAC Systems: Regulates primary chilled water and heating loops in large building infrastructure.

05/

Agricultural Irrigation: Controls bulk water transfer through supply channels and pump manifolds.

06/

Fire Protection: Serves as trusted shut-off valves in deluge systems and main fire-water lines.

How to Choose

Size & Flow Rate

Match the exact DN or NPS pipe size to prevent fluid velocity loss.

Pressure Rating

Verify system design pressures against corresponding PN or Class ratings.

Working Medium

Match body and seal materials to the fluid's chemical composition and slurry content.

Temperature Range

Select resilient elastomer seals or metallic trim based on operational limits.

Connection Standard

Confirm flange drilling patterns (DIN, ANSI, BS, JIS) before ordering.

Operating Method

Choose manual handwheel, gear operator, or electric drive based on line torque and accessibility.

Compliance

Ensure design, face-to-face dimensions, and pressure tests align with local project codes.

Supply Planning

Provide project volumes and delivery locations to optimize lead times and freight routing.

Materials & Customization Options

Select from proven industrial body materials tailored to your piping media:

Ductile / Cast Iron: Cost-effective solutions for water supply and municipal systems.

Carbon Steel (WCB): High-strength construction for medium-to-high pressure industrial service.

Stainless Steel (CF8/CF8M): Corrosion-resistant alloys for demanding chemicals and pure fluids.

Engineering & Supply Capabilities

Complete Flow Control Range: Supply spans gate, butterfly, globe, check, ball, and balance valves, alongside expansion joints and repair clamps.

Engineering Review: Technical team reviews project drawings, valve data sheets, and tender requirements for exact mechanical compatibility.

Quality Assurance: Every batch includes Mill Test Certificates (MTC), hydrostatic shell/seat test reports, and coating inspection data.

OEM Customization: Private labeling, custom valve colors, private nameplates, and custom actuation packaging available.

Seaworthy Packaging: Sturdy wooden crates, moisture barrier packaging, and flange protectors protect shipments during transit.

Comparison: Rising Stem vs. Non-Rising Stem Gate Valves

Feature	Rising Stem (OS&Y)	Non-Rising Stem (NRS)
Stem Movement	Moves vertically upward when opening	Rotates in place; gate travels internally
Position Visibility	Instant visual status from exposed stem height	Requires external pointer or mechanical indicator
Space Requirement	Requires higher vertical clearance	Compact overall height; ideal for tight spaces
Stem Thread Location	Outside fluid channel; protected from media	Inside liquid channel; exposed to fluid corrosion
Typical Placement	Above-ground plants, pump rooms, exposed pipes	Underground vaults, buried service, confined areas

FAQ

Q: What is a rising stem gate valve?

A: It is a gate valve where the stem moves vertically outward as the valve opens, providing clear visual indication of whether the valve is open or closed.

Q: What is the difference between a rising stem and non-rising stem valve?

A: The stem of a rising stem valve lifts upward outside the bonnet when opened. A non-rising stem valve stays at the same vertical height while the gate moves internally.

Q: Can rising stem gate valves be used for throttling?

A: No. Gate valves are designed strictly for fully open or fully closed service. Partial opening causes severe seat erosion and line vibration.

Q: Which seat type is better: resilient or metal?

A: Resilient seats (EPDM/NBR) provide complete zero-leakage sealing for clean water at lower temperatures. Metal seats are required for higher temperatures and abrasive fluids.

Q: What details are required for an accurate quotation?

A: Please provide the valve size, pressure rating, body material, seat material, working medium, operating temperature, connection standard, actuation type, and required quantity.

Q: Are custom configurations and OEM services supported?

A: Yes. Customization options include specific coatings (FBE), specialized flange dimensions, custom actuators, private labeling, and tailored packaging.

Request a Quote or Technical Support

Looking for reliable Rising Stem Gate Valves for your project or distribution network? Our engineering team is ready to assist with sizing, material selection, drawing reviews, and custom quotes.

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