F700 Series Wafer Type Check Valve

Product Overview

Applicable SizesZ:DN50 to DN1000

Operating Temperature Range：-20°C to 80°C (standard seal)； -20°C to 120°C (PTFE seal)

Body Materials：Cast Iron, Ductile Iron

Disc Materials：Stainless Steel, Bronze

Seal Materials：EPDM, NBR, PTFE (optional based on application)

Face-to-Face Standard：Structure length complies with EN 558-1, basic series 48 (DIN 3202 F6)

Flange Connection Standard：Complies with EN 1092-1

Features and Benefits

Lightweight Structure

Lightweight and compact wafer-style design for easy installation and maintenance.

Excellent Sealing Performance

Elastic valve seat ensures airtight closure and effectively prevents backflow.

Quick Response

Double spring mechanism evenly distributes load, enabling faster and more sensitive operation.

Strong Corrosion Resistance

Valve lining available in various synthetic rubber materials to suit most corrosive environments.

Flexible Installation

Can be installed in multiple orientations to adapt to complex piping layouts.

Optimized Flow Performance

Reduces pressure loss, enhances dynamic response, and eliminates valve vibration.

 F735 Silent Check Valve Series

Product Overview

Size Range: DN50 to DN800

Temperature Range: -20°C to 100°C (depending on seal material)

Body Material: Cast Iron, Ductile Iron

Disc Material: Stainless Steel, Bronze

Face-to-Face Dimension Standard: Complies with EN 558-1, Basic Series 48 (DIN 3202 F6)

Design Standard: Conforms to EN 12334

Features and Benefits
Quick Closing & Water Hammer Prevention

Load spring enables quick valve closure, effectively eliminating reverse flow impact and water hammer.

Wear & Corrosion Resistance

Internal parts made of stainless steel or bronze offer high wear resistance, excellent sealing performance, and strong corrosion resistance.

Flexible Installation

Can be installed horizontally or vertically with upward flow direction.

Hygienic Compliance

Sealing filler complies with hygienic standards, suitable for potable water and clean media applications.

Epoxy Coating Protection

Body surface and interior are coated with epoxy resin for enhanced corrosion resistance and extended service life.

Full Bore Design

Full flow channel design minimizes head loss and improves flow efficiency.

F725 Series Spherical Check Valve

Product Overview

Temperature Range：-20℃～120℃(depending on seal material)

Size Range：DN50～DN800

Body Materials：Cast iron；Ductile iron

Ball Material: EPDM-coated

Face-to-Face Dimension Standard: Complies with EN 558-1, Basic Series 48 (DIN 3202 F6)

Flange Connection Standard: EN 1092-2 Compliant Cast Iron Flanges

Features and Benefits
Seismic-Resistant Design
Ball check valve is designed to meet seismic requirements, ensuring operational stability.

Replaceable Ball Design
Replaceable sphere and fully assembled yoke allow for easy loading, unloading, and maintenance.

Guided Flow Path

Track-guided flow path ensures optimal ball tracking and sealing performance.

Two-Piece Body Construction

Two-piece structure ensures maximum bonnet sealing and mechanical integrity.

Multi-Material Compatibility

Ball encapsulated in EPDM or other materials, suitable for handling various media.

Epoxy Coated Protection

Both the internal and external surfaces of the valve body are coated with epoxy resin for enhanced corrosion resistance and durability.

F650 Series Cast Steel Check Valve

Product Overview

Size Range：DN15～DN600

Temperature Range：-25～450℃

Body Materials：Carbon steel

Bonnet material：Carbon steel

Disc material：Carbon steel

Stem material：Stainless steel

Seat Material: Hard-faced alloy overlay

Internal Components: Conform to API (American Petroleum Institute) standards

Features and Benefits

Rugged and Durable Construction
The robust structure ensures safe performance within the specified pressure and temperature ranges. Two connection types—flanged and butt-weld—are available to meet various installation requirements.

Convenient Maintenance Access
The bonnet allows access to the hinge and disc for maintenance without removing the valve from the pipeline, saving time and reducing operational downtime.

Gravity-Assisted Closure to Prevent Backflow
The valve disc closes by its own weight, preventing reverse flow before a damaging velocity develops, thereby avoiding destructive surge impact.

Optimized Flow Design with Reduced Head Loss
By balancing the disc and adopting an airfoil-shaped profile, head loss (or pressure differential loss) is minimized, improving overall system efficiency.

Shorter Stroke for Fast Closure
A reduced stroke length, combined with the balanced disc design, allows for quicker closure and minimizes the risk of fluid impact and water hammer.

Excellent Sealing Integrity
Minimal clearance at the pivot pin ensures tight, funnel-shaped seat sealing across the entire pressure range, guaranteeing effective sealing between the disc ring and the body ring.

F450 Series Cast Steel Gate Valve

Product Overview

Applicable Media: Water, oil, gas, and other common fluids

Temperature Range：-29℃～450℃(depending on sealing pair and materials)

Pressure Ratings    PN1.0～2.5MPa

Size Range          DN50～DN800

Connection standards: GB, ANSI, DIN, API, ISO, BS

Design Life: Valve body designed for up to 50 years

Body Materials：Carbon steel

Bonnet material：Carbon steel

Stem material：Stainless steel

Seat Material: Hard-faced alloy sealing surface

Internal Components: In accordance with API standards

Features and Benefits

Robust Valve Body

The cast steel valve body has sufficient strength to meet various working conditions and allows smooth fluid flow without obstruction.

Elastic Wedge Gate

The elastic wedge gate design automatically compensates for slight valve body deformation caused by pipeline stress, enhancing sealing performance and ensuring stable valve operation.

Sealed Welded Seat Ring

The seat ring is seal-welded for assembly, effectively eliminating potential leakage paths and significantly extending the valve’s service life.

T-Shaped Stem Connection

The stem features a T-shaped disc-stem connection, which helps prevent side stress from affecting the stem, ensuring smoother and more stable operation.

Corrosion-Resistant Packing System

Packing is treated with corrosion inhibitors to protect the stem from rust. The deep stuffing box design further extends packing life and reduces maintenance needs.