Our interactive guide demystifies valve selection for Chilled Water, Cooling Towers, Steam, and more. Get the manufacturer's recommendation instantly.
View Application GuideConditions: Chilled Water (Closed Loop), 5-12°C, PN10/PN16, Large Bore (DN250-800)
Flanged connections provide maximum rigidity and sealing for large pipes, preventing leakage. Ductile Iron is the most cost-effective body for HVAC water systems. A stainless or bronze disc prevents rust contamination. EPDM seats are perfect for chilled water temperatures, and electric actuators enable remote control and automation.
Conditions: Cooling Water (Open Loop), 25-40°C, PN10/PN16, poor water quality.
The open-loop system is highly corrosive. A full stainless steel (CF8/CF8M) valve offers superior corrosion resistance and extends service life. A Heavy-Body design provides greater structural strength. For budget-conscious projects, a ductile iron body with a Duplex steel disc is an excellent alternative with strong anti-pitting capabilities.
Conditions: Chilled/Hot Water, 5-85°C, PN16, frequent modulating duty.
The double offset design lifts the disc from the seat upon opening, drastically reducing friction and wear. It is the ultimate solution for high-frequency modulating services, lasting several times longer than concentric valves. This solves the most common point of failure for terminal unit control valves.
Conditions: System Water, PN16/PN25. Requires removal of downstream pipe.
A Lug-style body is the only safe choice for dead-end service. Its tapped bolt holes allow the valve to be independently secured to a single flange, safely holding back upstream pressure even when the downstream pipe is removed. An operator with a Lockout/Tagout (LOTO) feature is a critical safety requirement for maintenance.
Conditions: Fire Water (stagnant), PN16/PN25. Normally open.
Fire protection lines require valves that remain operational even after months of inactivity. The HP25 Series features a reinforced heavy-duty body to handle emergency pressure surges (up to 25 bar). Crucially, the combination of a stainless steel disc and high-grade EPDM seat prevents rust-locking (seizing), ensuring the valve opens instantly when the signal gearbox is activated.
Conditions: High-Temp Hot Water or Saturated Steam, 120°C - 250°C.
The triple offset geometry provides a true "zero-friction" camming action, which, combined with a laminated metal-graphite seat, perfectly solves the high-temperature sealing challenge. It achieves bubble-tight shutoff and is the ideal, high-performance choice for steam and hot water, often a highlight of our advanced product line.
As a true source manufacturer with an in-house foundry, we control every step from molten metal to finished valve. We control chemistry strictly (e.g., Ni > 9.3% for CF8 / 250μm Epoxy for DI) to ensure asset longevity.
We believe dependable isolation is a necessity, not an option. Every resilient-seated butterfly valve we produce is engineered for bi-directional, zero-leakage shutoff (ISO 5208 Rate A / API 598) as a baseline standard. This provides you with critical system isolation and energy efficiency without hidden costs
We provide a full range of actuation options, including electric and pneumatic (spring-return/double-acting). We specialize in safety and automation features like Lockout/Tagout (LOTO) provisions and Tamper Switches for remote monitoring, essential for modern building management systems (BMS).
1. Raw Material Inspection
2. In-House Foundry Casting
3. Precision CNC Machining
4. Fusion Bonded Epoxy Coating
5. Assembly & Pressure Testing
6. Final Product Ready for Shipment"Your ability to customize materials at the foundry level and deep understanding of our different HVAC sub-systems gave us a level of reliability and cost-efficiency that sourcing from multiple vendors could never achieve."
ISO 9001:2015
Quality Management
CE Marking
European Conformity
All our products are designed and manufactured to meet or exceed international standards. While ISO 9001 and CE are standard, we can facilitate project-specific, third-party certifications (e.g., WRAS, NSF-61 for drinking water) at the client's request and expense.
Engage with our application engineers to co-create the optimal valve solution for your project. Let us leverage our direct-from-foundry advantage to deliver unparalleled reliability and value.
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Address: DaZhan Industrial Park, Xiaozhan Town, Jinnan District, Tianjin, China
Copyright @ 2026. Tianjin Jiangrui Steel Casting Co., Ltd.
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