Product Overview

TheDuplex Stainless Steel Wafer Dual Plate Check Valve is a high-performance, compact non-return valve designed to prevent reverse flow in demanding industrial piping systems. Manufactured from premium duplex stainless steel (F51/UNS S31803 or F53/UNS S32750 super duplex), this valve provides exceptional strength, rintangan kakisan, and durability in aggressive environments including seawater, chemical, petrochemical, and offshore applications. The wafer-style body with dual-plate (double-disc) design conforms to API 594 Type A standards, featuring short face-to-face dimensions for space-saving installation between flanges. Available in 8-inch (DN200) size with 150LB pressure rating, this valve incorporates spring-loaded plates that ensure rapid closure when flow stops or reverses, effectively protecting pumps and compressors from damaging backflow. The one-piece body construction provides excellent structural integrity, while the dual-plate design minimizes pressure drop and reduces water hammer. This valve is the trusted choice for seawater, chemical, petrochemical, minyak & gas, and marine industries.

Duplex Stainless Steel Wafer Dual Plate Check Valve

Spesifikasi Teknikal

Duplex Stainless Steel Wafer Dual Plate Check Valve

Key Features

1. Premium Duplex Stainless Steel Construction – F51 / F53
2. API 594 Type A Compliant – Industry Standard Design
3. Dual Plate / Double-Disc Design – Fast Closure & Low Pressure Drop
4. Spring-Loaded Mechanism – Instantaneous Closure
5. One-Piece Body Construction – Leak-Free Integrity
6. Wafer Type Design – Compact & Space-Saving
7. Horizontal or Vertical Installation – Versatile Mounting
8. OEM Customization Support

Aplikasi

1. Offshore & Marine
2. bahan kimia & Petrochemical Processing
3. Minyak & Talian Paip Gas
4. Desalination & Rawatan Air
5. Power Generation

Duplex Stainless Steel Wafer Dual Plate Check Valve

Pembungkusan dan Penghantaran

Packing depends on the product type and quantity. Options include wooden crates or carton boxes with proper protection for flange faces. Shipment can be arranged by sea, kereta api, udara, or as per customer’s request.

Profil Syarikat

LUOYANG DATANG ENERGY TECH CO., LTD. is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for fire protection, HVAC, water treatment, minyak & gas, chemical, and industrial piping systems worldwide. All products are manufactured to international standards with UL/FM, CE, dan ISO 9001 pensijilan. With over 10 years of experience, a modern facility of 80,000 m², dan 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

Syarat Pembayaran

T/T, L/C pada pandangan, Western Union, PayPal, Apple Pay, Google Pay, Credit Card, dll.

Duplex Stainless Steel Wafer Dual Plate Check Valve

FAQ

S1: What is the difference between F51 and F53 duplex stainless steel?

A: F51 (UNS S31803/2205) is a standard duplex stainless steel containing 22% kromium, 5–6% nickel, dan 3% molybdenum, offering excellent strength and corrosion resistance. F53 (UNS S32750/2507) is a super duplex stainless steel containing 25% kromium, 7% nikel, dan 4% molybdenum, with a PREN value exceeding 40; it provides superior resistance to pitting and crevice corrosion in warm seawater and high-chloride environments. F51 is sufficient for most chemical and marine applications, whereas F53 is recommended for extremely corrosive environments (such as warm seawater or high-chloride conditions).

S2: What is the difference between a dual-plate check valve and a swing check valve?

A: Dual-plate check valves feature two semi-circular discs mounted on a central hinge pin with torsion springs; they offer short disc travel, rapid response, a compact design, and low pressure drop. Swing check valves utilize a single-disc hinge design suitable for larger sizes and offer high flow capacity, though they close more slowly. Dual-plate check valves are better suited for space-constrained applications and those requiring rapid closure.

S3: What is the difference between API 594 Type A and Type B?

A: API 594 Type A check valves have a shorter face-to-face dimension and are available in wafer, lug, or double-flanged configurations with single- or dual-plate designs, making them suitable for process plants. Type B check valves have a longer face-to-face dimension and typically feature double-flanged connections. This product utilizes the Type A design.

S4: Can this check valve be installed vertically?

A: ya. This valve supports both horizontal and vertical installation. For vertical installation, an upward flow direction is recommended to ensure reliable disc closure assisted by gravity.

S5: What is the opening pressure of the dual-plate check valve?

A: The opening pressure (cracking pressure) depends on the spring stiffness and is typically low (approximately 0.5–2 psi). Please refer to the product data sheet for specific values. The spring-loaded design ensures reliable closure even at low flow rates.

Duplex Stainless Steel Wafer Dual Plate Check Valve