Product Description
Product Introduction
01 The body of this valve series adopts a cast and forged structure, featuring an equal double sealing pair with semi-forced bi-directional sealing. The step-by-step operation of the sealing surface movement and the wedge block's wedge-opening and tightening movement ensures zero leakage.
02 The sealing surface has low friction during movement, allowing for easy opening and closing. Additionally, the sealing surface has a self-compensating function for wear.
03 The structure is simple and compact, with easy maintenance and a long service life.
04 The valve bonnet's packing chamber is equipped with a vacuum sealing structure, which provides a self-expanding pressure-tightening function. All connecting surfaces are sealed with high-strength expandable materials, completely isolating the system from the atmosphere and providing excellent system airtightness.
05 This valve series offers two connection types: flange and welding, and two driving methods: manual and electric. The valve is suitable for pipelines with working temperatures of ≤425°C and ≤550°C, and the working media can be water, steam, or air. It is primarily used as an on-off device, especially suitable for vacuum isolation and sealing in steam turbine condensers and vacuum negative pressure systems in thermal power plants.
Product Parameters
Product Name |
Vacuum Parallel Double Disc Gate Valve |
Model |
NKZ44H |
Material |
Options: (Stainless Steel / Carbon Steel / Cast Steel) |
Nominal Pressure |
1.6~10.0MPA |

Nominal Pressure PN/MPa |
/MPaTest Pressure/MPa |
Shell Strength Test |
Upper Sealing Test |
Sealing Test |
2.5 |
3.8 |
2.8 |
2.8 |
4.0 |
6.0 |
4.4 |
4.4 |
6.4 |
9.6 |
7.0 |
7.0 |
10.0 |
15.0 |
11.0 |
11.0 |
Company Profile
Company Profile
Vision
With decades of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
At the time of economic globalization, it is our consistent target and objective to integrate and export all kinds of technology, management mode, engineering project and manpower as per the actual requirement of our client With our own abundant technical strength, superior integration capability of technology and resources, well experienced of project implementation and management as basis and platform;
Let China go out to the world, and make the world know of China;
Professional
Professional technical and management team with abundant experience in the implementation of domestic and international projects;
Responsive
Responsively and meticulously, translating your needs into complete solutions;
Integration
Integrating various technologies and resources in China and fulfilling complementary advantages, by relying on professional teams;
Motivation
Motivated to provide the optimal solution and quality products;
Exceptional
Exceptional, delivery and,implementation of projects to meet, your expectations;
Our Team
Professional technical team
Prime is staffed with professional import & export team skilled with the practice of import and export business, including sea freight packing, logistics organization, L/C review, cargo booking, and customs clearance, L/C negotiation, double authentication of shipment documents, etc.
All above personnel are well experienced in the execution of projects in Southeast Asia and Middle East.
Complete procurement mechanism
Our professional team of procurement offers strict management of supplier 's qualification inspection and selection, complete system of supplier listing, rating and elimination, to ensure the supplier is qualified and capable of implementing the project and supplied with product of high quality, and maintain a healthy and good condition of credibility, contract settlement and capital flow management.
Quality management system
Our complete quality management system , the process control covering from Scheme formulation , engineering technology, detailed design, to processing and manufacturing of equipment and material , ex-factory test and site erection and commissioning till it put into production, which through multi-level inspection, tour inspection, supervision and node control can ensure quality of the final product.
Well experienced
Executive team is abundant in experience of overseas project implementation with similar project working experiences, esp. experience in Southeast Asia, Middle East projects;
ISO System Certification
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