Water Medium Heavy Hammer Hydraulic Control Check Butterfly Valve

Specification

TIANYU Hydraulic Control Heavy Hammer Check Butterfly Valve: An Innovative Solution for Industrial Fluid Safety Control

I. Product Technical Overview

TIANYU hydraulic control heavy hammer check butterfly valve is specially designed for fluid safety control in industrial pipeline systems. It adopts a triple eccentric sealing structure and a hydraulic heavy hammer linkage mechanism, covering DN50-DN400 (2″-16″) in diameter, suitable for low-pressure conditions of PN<1.6MPa, with a medium temperature range of -40℃-120℃ (standard type) and a maximum temperature resistance of 200℃. The valve integrates the advantages of soft and hard seals, with the seat made of PTFE composite material. Combined with the automatic opening/closing function of the hydraulic heavy hammer, it can achieve bidirectional check and flow control for media such as water, gas, and oil, and is widely used in anti-backflow scenarios in metallurgy, power, water supply/drainage, and petrochemical industries.

II. Core Product Features

(A) Triple Eccentric Sealing Structure Design

TIANYU butterfly valve adopts the three-dimensional eccentric principle (triple eccentricity of stem axis, disc center, and sealing surface), so that the disc disengages from the seat instantly when opening, reducing friction and wear. When closing, the conical sealing surface forms a self-tightening seal, with a leakage rate ≤1×10⁻⁹m³/s (API 598 Class VI standard). Compared with traditional concentric butterfly valves, the triple eccentric structure increases the sealing life by 3 times, especially suitable for working conditions with particulate media.

(B) Hydraulic Heavy Hammer Linkage System

Automatic Check Function: The heavy hammer is linked with the disc through a hydraulic damper. When the pump stops, it relies on gravity and medium backflow to push for quick closing, with a closing time ≤1.5 seconds (DN100), effectively preventing water hammer impact.
Adjustable Damping Control: The hydraulic system can adjust the falling speed of the heavy hammer to avoid pipeline vibration caused by instant closing, adapting to different flow requirements.
Manual Emergency Operation: Equipped with a handwheel drive mechanism, it can be manually opened and closed in case of hydraulic system failure, complying with industrial safety regulations.

(C) Multi-Level Hard-Soft Composite Sealing

Component	Material	Performance Indicators
Body	WCB carbon steel/304 stainless steel	Tensile strength ≥485MPa, temperature adaptation of -40℃-425℃
Disc	Ductile iron with chrome plating	Hardness HV≥500, resistant to erosion and wear
Seat	PTFE+glass fiber composite layer	Compression set ≤8% (200℃×72h), chemical corrosion resistance
Stem	2Cr13 stainless steel	Trapezoidal thread accuracy 6H, blowout-proof design (ASME B16.34)

III. Key Technical Attributes

Parameter Category	Technical Indicators	Expansion Options
Size Range	DN50-DN400 (2″-16″)	Customized DN500-DN1200 (subject to engineering evaluation)
Pressure Rating	PN10/PN16 (1.0/1.6MPa)	High-pressure type PN25/PN40 (up to 4.0MPa)
Applicable Temperature	-40℃-120℃ (standard)/≤200℃ (high-temperature type)	Special customization for low-temperature -196℃ (liquid nitrogen condition)
Connection Type	Flange (GB/T 9113/ANSI B16.5)	Wafer-type, welded-type interfaces (according to ASME B16.25)
Compliance Standards	GB/T 12238, ISO 5281	CE, API 609, fire certification (API 607)

Product Overview

The multi-level PTFE soft-sealed butterfly valve is designed based on the three-dimensional eccentric principle. The sealing ring adopts a multi-level structure that combines hard and soft sealing. It is suitable for regulating and shutting off fluids in pipelines for various media, such as metallurgy, electricity, petrochemicals, air, gas, water supply, and drainage, where the medium temperature is ≤200°C. It offers reliable sealing performance and extends the application of general butterfly valves into the medium-to-high pressure field. Building on this structure, a new generation of three-eccentric PTFE-sealed butterfly valves can be created by replacing the multi-level sealing ring with polytetrafluoroethylene, which is widely used for corrosive media at temperatures ≤200°C.

Key Product Features:

1. The butterfly plate seal adopts a hard and soft multi-level structure, combining the advantages of both hard and soft sealing. It offers excellent sealing performance in both low and high-temperature conditions.
2. The three-eccentric structure ensures minimal friction between the seat and the butterfly plate, resulting in increasingly tighter sealing performance and achieving zero leakage.
3. Low opening and closing torque, flexible operation, energy-saving, and long service life.
4.Wide application range due to its high-temperature, high-pressure, and corrosion-resistant properties.
5.The new generation three-eccentric PTFE-sealed butterfly valve combines the advantages of the three-eccentric sealing structure and soft sealing. It provides reliable sealing performance, a wide application range, and a longer service life.
6.The electric and pneumatic devices adopt well-known domestic and foreign products, ensuring even more reliable performance.

VI. TIANYU Brand Customization Advantages

Relying on 15 years of industrial valve manufacturing experience, TIANYU provides end-to-end customized services:

In-Depth Technical Customization: Supports non-standard pressure ratings (up to PN100), special temperature ranges (-196℃-800℃), explosion-proof hydraulic systems (Ex d IIC T6), and non-standard flanges (DIN/GOST) design, equipped with 3D modeling and CFD flow field analysis.
Efficient Delivery System: 25-day delivery for regular orders, 15-day turnaround for small batch customization (MOQ 1 units), 72-hour emergency channel for urgent orders, with supporting production progress visual tracking.
Global Service Network: 18-month extended warranty, 24/7 response from three major service centers in APAC, Europe, and North America, 48-hour airfreight for critical spare parts, providing digital installation manuals and AR remote debugging support.

Valve Details

IV. Manufacturing Processes and Quality Control

(A) Precision Manufacturing Flow

Body Molding:
- Adopts resin sand casting (carbon steel) or centrifugal casting (stainless steel), and undergoes double testing by ultrasonic testing (UT) and radiographic testing (RT) to eliminate internal defects.
- High-temperature annealing treatment relieves internal stress, and the hardness of WCB body is controlled at HB170-210 to ensure structural strength.
Sealing Surface Processing:
- The sealing surface is ground by a five-axis CNC grinder, with flatness error ≤0.01mm and surface roughness Ra≤0.4μm.
- The PTFE sealing ring is formed by compression molding, and the interference fit gap with the body is ≤0.02mm to ensure zero leakage.
Hydraulic System Assembly:
- The heavy hammer and hydraulic damper are precisely adjusted through a lever mechanism, with a linkage error ≤±0.5°, and each valve undergoes 500 opening/closing life tests.

(B) Quality Certification System

Material Traceability: Batch numbers of key components can be traced to heat numbers and chemical composition reports, supporting third-party PMI material testing.
Performance Testing: 1.5x nominal pressure shell strength test (holding pressure for 30 minutes), 1.1x pressure seal test (helium leak detection), and sampling for 100,000 opening/closing cycle tests.
System Certification: Holds ISO 9001, CE and other certificates, and high-pressure models pass SGS third-party pressure tests.

Application

V. Product Application Scenarios

(A) Water Supply and Drainage Systems

In urban water supply main pipes, TIANYU butterfly valves can prevent backflow when the pump stops, protecting the pump impeller. A case study in a waterworks shows that after installing this valve, the peak water hammer pressure was reduced by 70%, and pipeline leakage accidents were reduced by 85%.

(B) Metallurgy Industry

Used in blast furnace cooling water pipelines (1.0MPa/80℃), the triple eccentric structure resists scale deposition, and the PTFE sealing surface is resistant to chloride ion corrosion in cooling water, with a service life of more than 5 years, reducing maintenance frequency by 2 times/year compared with traditional valves.

(C) Petrochemical Processes

In the inlet and outlet pipelines of LPG storage tanks, the quick closing function of the hydraulic heavy hammer can cut off the medium flow in case of emergency, meeting the API 650 storage tank safety specifications. In the application of a refinery, the valve still maintained sealing performance under a temperature difference of -10℃-60℃.

(D) Power System

Suitable for power plant circulating water pipelines (1.6MPa/120℃), the low torque design reduces the power demand of the electric actuator by 30%, and combined with the DCS system to achieve remote automatic control, improving the automation level of the power plant.