生成纯白背景图

Y-Spring Check Valve 800WOG Screwed End

/ Check Valves, High Pressure Ball Valves / By
生成纯白背景图
Y-Spring   Check   Valve    800WOG    Screwed    End
Investment casting Body and Cap
Design and manufacture:ASME B16.34 Test and  inspection:API598
Size:1/4 to 2  inches
Thread   Ends:ANSI    B1.20.1(NPT),BS7/1(DIN2999),ISO7/1    (ISO228) Materials:CF8M,CF8
  • Unique Y-type spring check design, combines the advantages of Y-strainer and check valve, compact structure and space-saving.
  • Pressure rating up to 800WOG, stable performance for water, oil, gas and other common industrial media.
  • Body & cap made by investment casting, with high density, smooth surface, strong pressure resistance and good sealing performance.
  • Designed and manufactured in strict accordance with ASME B16.34 standard, meeting international industrial specifications.
  • 100% tested and inspected per API 598 standard, ensuring qualified products before delivery and high reliability.
  • Screwed end design, easy to install and disassemble, no complicated welding required, reducing maintenance cost.
  • Full size coverage: 1/4″ to 2″, meeting different pipeline size requirements.
  • Multi-thread standards available: ANSI B1.20.1 (NPT), BS7/1 (DIN2999), ISO7/1 (ISO228), adapting to global market needs.
  • Material options: CF8 (AISI 304) and CF8M (AISI 316) stainless steel, excellent corrosion resistance, suitable for corrosive and non-corrosive media.
  • Spring-loaded automatic operation, sensitive opening and closing, effectively preventing medium backflow, protecting pumps, valves and other pipeline equipment from damage.

Full Technical Parameters

1. Basic Specification

  • Valve Type: Y-Spring Check Valve
  • Pressure Rating: 800WOG (Water, Oil, Gas)
  • Design & Manufacturing Standard: ASME B16.34
  • Inspection & Test Standard: API 598 (including shell test, seat tightness test, etc.)
  • Operation Mode: Automatic (Spring-loaded, no manual operation)
  • Flow Direction: One-way (Prevents backflow)

2. Size & End Connections

  • Nominal Size (NPS): 1/4″ ~ 2″
  • End Type: Screwed End (Threaded End)
  • Thread Standards:
    • ANSI B1.20.1 (NPT) – American Standard Pipe Thread
    • BS7/1 (DIN2999) – British Standard Pipe Thread
    • ISO7/1 (ISO228) – International Standard Pipe Thread

3. Body & Cap

  • Construction Process: Investment Casting
  • Material Options:
    • CF8: AISI 304 Stainless Steel, suitable for general corrosive media, good rust resistance.
    • CF8M: AISI 316 Stainless Steel, better corrosion resistance than CF8, suitable for harsh environments (e.g., marine, chemical industry).
  • Surface Treatment: Polished (internal and external), smooth surface to reduce flow resistance and prevent medium accumulation.

4. Internal Structure & Parts

  • Spring: Stainless Steel Spring, with stable elasticity, ensuring sensitive opening and closing of the valve disc.
  • Valve Disc: Stainless Steel (consistent with body material), precision machined, good sealing performance.
  • Seat: Reinforced PTFE, high temperature resistance, good sealing, long service life.
  • Flow Channel: Y-type design, smooth flow channel, low flow resistance, reducing energy loss.

5. Temperature Range

  • Standard Temperature Range: -29°C ~ 180°C (depends on seat material; can be customized for special temperature requirements).

6. Application

  • Suitable for media: Water, oil, gas, chemical reagents and other non-viscous media.
  • Applicable industries: Petroleum, chemical, water treatment, food and beverage, industrial pipelines, etc.
  • Installation Note: Recommended to install vertically (flow direction from bottom to top) to ensure the spring works normally and the valve disc closes tightly.

Working Principle

The Y-Spring Check Valve adopts a one-way flow control principle, relying on the combination of medium pressure and spring force to realize automatic opening and closing, and its core function is to prevent medium backflow in the pipeline.

1. Forward Flow (Normal Working State): When the medium flows forward (from the inlet to the outlet of the valve), the pressure of the medium acts on the valve disc, overcoming the elastic force of the built-in stainless steel spring. The valve disc is pushed open, and the medium passes through the Y-shaped flow channel smoothly. The Y-type design ensures that the flow resistance is small, and the medium can flow through efficiently without obvious pressure loss.

2. Backflow (Preventive State): When the medium stops flowing or flows backward (from the outlet to the inlet), the forward pressure of the medium disappears. At this time, the spring rebounds and exerts a downward force on the valve disc, pressing the valve disc tightly on the valve seat. This forms a reliable seal, completely blocking the backflow of the medium, thereby protecting the upstream equipment (such as pumps, meters, valves) from damage caused by backflow impact and medium pollution.

3. Key Advantage: The spring-loaded design makes the valve disc sensitive to pressure changes. Even when the forward medium pressure is low, the valve can be opened smoothly; when backflow occurs, the valve disc can close quickly and tightly, ensuring the safety and stability of the entire pipeline system.