BS2779 4" Brass Swing Check Valve Stainless Steel Spring

4 Inch Female HPB 57-3 Brass Spring Check Valves

• Description

​Working Pressure 16bar (232 psi)
Working Temperature from -10 ℃ to +120 ℃ (from 14℉ to 248℉)
Thread ISO228 (equivalent to DIN 259 and BS2779)

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• Details

​Brass Valve Body: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.

Brass Bonnet: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.

Brass Valve Spool: High-density forging, no blister, no air holes, no leakage. Made by special high precision CNC machines.

Rubber Washer: Made of imported raw material, long service life and not easy to leak.

Spring: Made of imported raw material, stable performance, good sealing, and not easy to leak.

• Technical Specification

NO MOQ ! Instant Order， Immediate Delivery！DOUBLE-LIN ，Wordwide Trusted！

Company Introduction

Double-Lin, which was established in 2000 in China, is a manufacturing company for global market. It is located in Yuhuan Island (the southeast coast of Zhejiang, China)， which is the main manufacturing base of China. Our products with self-owned brand are widely distributed to more than 100 countries and regions, and Chinese domestic market. Chairman Mr. Lin Hailin adopts strategic perspective to plan industrial layout adjustment and integrate business scope into suppliers of comprehensive system solutions, including 4 major areas: public buildings and household water control system solutions, public buildings and home heating system solutions, safe transportation and use of gas system solutions, and family's bathroom hardware solutions. Our products cover nearly 10,000 kinds of products with different sizes.

Double-Lin sticks to the original intention of entrepreneurship, adheres to the manufacture of durable products to meet the requirements of customers , and provides the comfortable and safe use experience of global users. Our product's quality meets the most strict international standard and requirements of high quality, technical innovation, and high technology. For processing procedures, we insist on continous improvement, basically realizing the automation and modernization of production. Our products are very flexible to match with each other. The key coreparts and the main production automation equiments are all imported from Europe.

We promise that our products are globally consistent, no matter Chinese mainland, North America, European Union, Middle Ease, Far Ease, or Asia-Pacific areas keeps the same strict production and inspection standards. Double-Lin promotes its products sales both in the global market and Chinese domestic market by sole agent and chain stores. With the belief "credibility, integrity, and win-win", we aim to well balance the mutual benefit between our company and our customers. For now, our products have been sold to more than 100 countries in the world. The general agenct system has been implemented in over 20 countries, and more than 40 provincial or city agents have been deployed in Chinese mainland. With 83 patent achievements, Double-Lin has a complete and considerable protection on intellectual property. The trademark is also registered in more than 90 individual countries, where intellectual property is legally protected by the commodities importing countries. The trademark of 45 general categories are registered in China.

Double-Lin has a strong bond with Yuhuan and its local residents, as Yuhuan is where our company created history and wealth. We devided to develop precise manufacturing, product's R&D, and designer training, set up testing labs, improve sales and after service, and create the outline of our staff, suppliers, and clients. To promote Double-Lin's stable and healthy development.

Double-Lin, Worldwide Trusted!