API wafer dual plate check valve

API 594 Dual Plate Check Valve

Solid is an check valve API 594 Manufacturer supplying cast steel wafer check valves for oil and gas, petrochemical, power generation and industrial process piping. The compact dual plate design automatically prevents reverse flow while requiring less installation space than many conventional flanged swing check valves.

Each API 594 Dual Plate Check Valve is designed according to API 594 and inspected and tested according to API 598. Available sizes range from 2 to 32 inches, with ASME Classes 150, 300, 600, 900 and 1500. Carbon steel and stainless steel material options allow the valve configuration to be matched to your medium, pressure, temperature and corrosion conditions.

Send Solid your valve data sheet, operating conditions or replacement dimensions for technical review and quotation.

Wafer Dual Plate Check Valve Specification

API 594 and API 598

API 594 and API 598 have different functions in a valve specification.

API 594 is the design standard for check valves with wafer, lug, flanged and butt-weld body configurations. For this product, it defines the applicable dual plate construction, dimensions, materials and design requirements.

API 598 is an inspection and testing standard. It covers valve examination, shell pressure testing, closure testing and applicable leakage acceptance requirements.

The technically correct description for this product is:

Designed and manufactured according to API 594; inspected and tested according to API 598.

When evaluating an API 598 Dual Plate Check Valve Manufacturer, you should confirm that the quotation also identifies the applicable design standard. API 598 alone does not define the valve body pattern, internal construction or face-to-face dimensions.

As an API 594 & API 598 Dual Plate Check Valve Manufacturer, Solid confirms the design standard, testing scope and required documentation before production.

Spring-Assisted Dual Plate Design

The valve contains two plates that rotate around a central shaft. Forward flow opens the plates, while the springs assist them toward the seat when the flow decreases or starts to reverse.

Compared with a conventional full-size swing disc, the two smaller plates have less travel and lower moving mass. This allows the valve to respond more quickly to flow reversal and can reduce check valve slam when the spring torque and valve size are correctly selected.

The design does not eliminate water hammer under every operating condition. Flow velocity, pump shutdown time, fluid properties and pipeline layout also affect pressure surges. For pump discharge or other surge-sensitive applications, provide the operating flow data with your RFQ.

Compact Wafer Body for Restricted Installation Space

The Dual Plate Wafer Check Valve is installed between pipeline flanges and has a shorter face-to-face length than many conventional flanged check valves. Its compact construction is suitable for equipment skids, pump stations and industrial piping where installation space and valve weight are important.

Solid can review your existing valve drawing or measured dimensions before confirming the replacement configuration.

Body and Internal Material Options

ASTM A216 WCB

A WCB Dual Plate Wafer Check Valve is commonly selected for oil, gas, water and other compatible non-corrosive industrial media. The allowable pressure-temperature rating must be checked according to ASME B16.34 and the selected pressure class.

ASTM A351 CF8 and CF3

CF8 and CF3 provide 304-type stainless steel options for applications requiring greater corrosion resistance than carbon steel. CF3 has a lower carbon content and may be selected when a project specifies a low-carbon stainless steel grade.

ASTM A351 CF8M and CF3M

A Stainless Steel Dual Plate Check Valve manufactured from CF8M or CF3M provides a 316-type stainless steel option containing molybdenum. These grades may be considered for more demanding corrosive environments, but compatibility must be verified against the actual fluid composition, concentration and temperature.

Spring and Shaft Selection

Available spring materials include Inconel and 17-7PH. Shaft options include F6a, 304, 316, 304L, 316L and 17-7PH. These components should be selected together with the body, plate and seat materials according to the temperature, corrosion conditions, cycling frequency and differential pressure.

View additional Solid cast steel valve options.

API 594 Dual Plate Check Valve Applications

This valve can be configured for automatic backflow prevention in:

• Oil and gas processing systems

• Petroleum refineries

• Petrochemical plants

• Power generation facilities

• Pump discharge lines

• Industrial water systems

• Steam and utility piping

• Chemical processing systems

• Equipment skids

• High-pressure process pipelines

Media containing solids, fibers, heavy deposits or abrasive particles require additional review. Accumulated material may interfere with plate movement or prevent complete seat closure.

API Cast Steel or Ductile Iron Dual Plate Check Valve?

Choose this API 594 cast steel product when your project requires:

• API 594 design

• API 598 inspection and testing

• ASME Classes 150–1500

• WCB or stainless steel construction

• Oil, gas, petrochemical or industrial process service

• A compact wafer check valve for higher-pressure piping

For PN10, PN16 or PN25 municipal water and wastewater systems requiring a ductile iron body and elastomer seat, use the dedicated ductile iron product page.

Why Choose Solid as Your API 598 Dual Plate Check Valve Manufacturer?

• Compliance with Industry Standards: The DPWC Series Dual Plate Wafer Check Valve is designed to meet API 594 & 598 standards, ensuring high-quality performance in preventing backflow.

• Reliable and Efficient Operation: Equipped with a spring-assisted mechanism, these valves automatically close, ensuring smooth and dependable functionality.

• Versatility in Size and Pressure: Available in sizes ranging from 2-32 inches and pressure classes of 150-1500LB, making it suitable for a wide range of applications in both horizontal and vertical installations.

• High-Quality Materials: Manufactured using premium materials such as ASTM A216 WCB, ASTM A351 CF8, CF8M, CF3, and CF3M, ensuring durability and resistance to harsh environments.

• Precision Engineering: Designed and manufactured in accordance with ASME B16.34, API 594, and API 6D standards for precise performance and compatibility.

• Thorough Testing: Inspection and testing are carried out according to API 598, ensuring that each valve meets rigorous quality and performance criteria.

Frequently Asked Questions

Q:What is the difference between API 594 and API 598?

API 594 covers check valve design and construction. API 598 covers inspection and pressure testing. The valve is designed according to API 594 and tested according to API 598.

Q:What sizes and pressure classes are available?

The available range covers 2–32 inches and ASME Classes 150, 300, 600, 900 and 1500. Specific material and pressure combinations must be confirmed during quotation.

Q:Can the valve be installed vertically?

Vertical installation can be reviewed, but the flow direction, minimum flow rate, fluid properties and spring configuration must be confirmed before selection.

Contact Solid Today to get your custom-designed API 598 Dual Plate Check Valve and enhance your fluid control system’s reliability and efficiency! Let our team assist you with your specific needs.

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