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Valves

Discover our comprehensive series of industrial valves, including trunnion-mounted and floating ball valves, butterfly valves, pressure-seal valves, gate and globe valves, check and double-block & bleed plug valves. Each model is meticulously crafted to control flow with precision, withstand demanding conditions and deliver lasting operational stability. Backed by decades of engineering expertise and stringent quality inspection, our solutions empower your systems to run safer, cleaner and more efficiently.

Valves
FAQ
  • > About SUNGO
  • > Installation & Commissioning
  • > Special Applications
  • > Valve Basics & Selection

How about the product after-sales service?

In the vast majority of cases, the products can operate normally throughout the warranty period. We also provide consumable spare parts based on the product itself and customer requirements. After one operating cycle, customers only need to perform simple replacements. In the event of complex situations, we can offer online guidance when customers need it, or even dispatch personnel to the project site for repairs and replacements. Naturally, when conditions permit, we also provide a return-to-factory maintenance service.

How to ensure that the product is of high quality?

We have invested in new CNC and full range of testing equipment, trained a large number of quality engineers and operators, and fully adhered to the quality management systems of ISO9001, API Q1 and TS.,100% inspection before leaving the factory, We conduct factory operations and quality management to ensure the high quality and consistency of the products.

What is the delivery time?

For standard product orders are typically delivered within approximately 30~90 days for delivery, please consult our sales representatives.

What is the area of your company and factory?

58000m²

What directions or markings should be noted during valve installation?

Follow the flow direction arrow and installation position marks on the valve body. Ensure the valve is installed according to the medium flow and actuator orientation.

What are the wiring methods and commissioning precautions for electric valves?

Connect according to the wiring diagram on the actuator. Check power supply, control signal, and grounding before operation. During commissioning, verify open/close positions and limit switches.

What standards should be followed when pressure testing new valves?

Follow standards such as API 598, GB/T 13927, or EN 12266. Test both shell strength and seat sealing before installation.

What are the reasons for valves not opening and closing completely?

Common causes include foreign particles, seal wear, actuator failure, or improper installation. Regular cleaning and maintenance can prevent these issues.

Which type of valve should be selected for high-temperature, high-pressure systems?

Use forged steel, alloy steel, or high-pressure gate, globe, or ball valves designed to withstand extreme conditions.

What materials are suitable for corrosive fluids ?

Choose stainless steel, PTFE-lined, or plastic (PVC, PP) valves for strong chemical resistance.

Are there differences in valve selection for gas and liquid systems?

Yes. Gas systems need tight sealing and leak prevention, while liquid systems focus on flow control and pressure drop performance.

How to select valves for low-temperature or explosion-proof environments?

Use cryogenic valves with special seals for low temperatures, and pneumatic valves or explosion-proof electric actuators for hazardous areas.

What are the main types of valves?

Gate, globe, ball, butterfly, check, safety, and control valves are the most common types, each designed for specific flow and pressure control functions.

How to select the appropriate valve based on the medium, pressure, and temperature?

Choose based on medium, pressure, and temperature: Corrosive fluids → stainless steel or lined valves. High pressure → forged or alloy steel valves. High temperature → heat-resistant materials. For flow control → globe or control valves.

What are the differences between manual, electric, and pneumatic valves?

Manual: Hand-operated, simple and low-cost. Electric: Motor-driven, precise and remote-controlled. Pneumatic: Air-driven, fast and safe for explosive areas

What are the characteristics of different valve materials?

Cast iron: Low-cost, for low pressure. Carbon steel: Strong, for high pressure. Stainless steel: Corrosion-resistant. Brass/Bronze: Durable, for water or marine use. Plastic: Light, chemical-resistant.

Quality Control

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For a better quotation, please specify the required flow rate (m³/h or L/min) and head range (m or ft) or other specifications. Our sales representative will contact you within 24 hours. Thank you for your interest!