forede® proudly offers the Z45X Flange End Non-Rising Stem (NRS) Gate Valve, a cutting-edge solution designed to deliver precise, long-lasting flow control in diverse industrial and municipal applications.
What distinguishes this valve is its non-rising stem architecture, which eliminates the need for vertical space during operation-making it a perfect fit for installations where overhead clearance is limited. The stem is crafted from 2CR13 Stainless Steel, ensuring exceptional resistance to corrosion and wear, even in aggressive fluid environments. Both the bonnet and body are made from Ductile Iron QT450, providing robust structural integrity to handle sustained high-pressure conditions. Its seal, featuring Ductile Iron QT450 covered by NBR, ensures a tight, reliable shut-off to prevent leakage. The flange end complies with ANSI150LB, GB Standard, and BS Standard, while the epoxy red or blue surface finishing offers superior corrosion protection and visual clarity.
Models range from 2 Inch (50 mm) to 14 Inch (350 mm), all utilizing flange end connections, NRS valve type, and operating at a working pressure of 1.0/1.6 Mpa, with Red or Blue color options available.
Ideal for municipal water supply systems, industrial process pipelines, and sewage treatment networks, the Z45X Flange End NRS Gate Valve is engineered by forede® to deliver consistent, trouble-free performance. It represents a smart investment for those prioritizing reliability, space efficiency, and long-term cost savings in flow control.
| Body Material |
Ductile Iron, QT450 |
| Bonnet Material |
Ductile Iron ,OT450 |
| Stem Material |
2 Cr13 Stainless Steel |
| Seal Material |
Ductile Iron , QT450, Coverd By NBR |
| Flange End |
ANSI 150 LB / GB / BS Standard |
| Valve Type |
NRS |
| Working Pressure |
1.6 Mpa |
| Surface Finishing |
Epoxy Red or Blue |
1. Advantage of Non-Rising Stem (NRS) Design
Q: What's the benefit of the NRS (Non-Rising Stem) design in this gate valve?
A: The NRS design means the stem doesn't rise when opening/closing, saving vertical space. It's ideal for tight spaces like underground pipelines, where vertical clearance is limited.
2. NBR Seal Media Compatibility
Q: What fluids should be avoided with the NBR-coated ductile iron seal?
A: NBR (Nitrile Butadiene Rubber) works well with water, oil, and general industrial fluids. Avoid strong acids, alkalis, ketones, or esters-these can damage NBR and cause leaks. For such media, use a valve with FKM seals.
3. Installation Flow Direction
Q: Does this gate valve have a required flow direction during installation?
A: Gate valves are bi-directional (seal both ways). But install according to the "flow arrow" or common fluid direction for even gate stress. This ensures longer seal life and smooth operation.
4. Maintenance Frequency and Key Checks
Q: How often should this valve be maintained, and what parts need attention?
A: Maintain every 3-6 months. Focus on: lubricating the 2CR13 stainless steel stem (use grease), inspecting the NBR seal for cracks/wear, checking flange connections for leaks, and ensuring the handwheel turns smoothly.
5. Sizing for Piping
Q: How to choose the right valve size (e.g., 2 inch vs. 14 inch)?
A: Match the valve size to your pipe's nominal diameter (DN). For a DN50 pipe, choose Z45X-16Q-50 (2 inch); for DN350, choose Z45X-16Q-350 (14 inch). This ensures proper flow and no installation issues.
6. 2CR13 Stem Corrosion Protection
Q: How to protect the 2CR13 stainless steel stem in humid environments?
A: 2CR13 resists rust well, but in humid or coastal areas, clean the stem regularly and apply a stainless-steel protectant. This prevents corrosion and ensures smooth operation.
7. Handwheel Operation Torque
Q: Is the handwheel hard to turn, and does torque change with valve size?
A: Torque increases with valve size-larger valves (e.g., 14 inch) need more force than smaller ones (e.g., 2 inch). If turning is stiff, check for stem corrosion or insufficient lubrication.
8. Epoxy Coating Durability Outdoors
Q: How long does the epoxy red/blue coating last in outdoor conditions?
A: In typical outdoor environments, the epoxy coating lasts 5-8 years. Inspect yearly for chipping; touch up with matching epoxy paint if damaged.
9. Working Pressure Selection
Q: When to use 1.0MPa vs. 1.6MPa working pressure?
A: Choose 1.0MPa for low-pressure systems and 1.6MPa for higher-pressure applications. Never let your system's pressure exceed the valve's working pressure to avoid damage.
10. NRS Gate Valve vs. Rising Stem Gate Valve
Q: When is this NRS gate valve better than a rising stem gate valve?
A: NRS gate valves save vertical space (ideal for underground/limited clearance areas). Rising stem valves let you see the stem position to judge open/closed status. Use NRS when space is tight; rising stem when visual status is needed.
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