This Pressure Limiting Valve is made of cast brass. It keeps the pipe pressure steady within a set safe range. It prevents water equipment damage caused by overpressure and ensures a consistent water flow for the entire system. It has a smooth, straight-through design. You can install it directly in line with the pipe; no need to adjust the direction when fitting it. This valve works with most water supply and drainage systems, as well as HVAC circulation systems.
This brass angle-type safety relief valve is a core safety component for boilers, water heaters, and heating systems. It features a built-in spring-loaded valve core that automatically opens to relieve pressure when system pressure exceeds the preset threshold. And its 90° angled structure is ideal for tight spaces adjacent to equipment. The top red knob enables manual adjustment of spring pressure to meet the safety pressure requirements of various types of equipment.
Model No.: JX-0996
Size: 1/2″x 3/4″
Material: Brass
Finishing: Sand-blasted
Seal material: PTFE
Structure mode: Spring
Thread type: G thread
Connection: ISO228
Types: 3 Bar, 5 Bar, 6 Bar, 8 Bar
Working temperature Resistance:-10-120°C
Application: Water, oil, non-corrosive, non-flammable gas
Brass Spring Check Valve
This brass spring check valve is a dedicated one-way flow protection component for piping systems. Constructed from cast brass and compatible with hot and cold water, and other media. Its spring-actuated self-closing valve core prevents media backflow, and it supports rapid closure even under low-pressure differentials. The valve is suitable for both vertical and horizontal installation. It’s a widely used component for water pump discharge lines, the upstream side of water heaters, and other similar applications.
Model No.: JX-0604
Size: 1/2″-2″
Material: CW602N, CW617N
Finishing: Sand blasted
Plastic core
Working temperature: -10-120℃
Working pressure: 200psi
Flow direction: Single Way
Media: Water
Threaded Ends: Female NPT
Cracking Pressure: 0.50psi
Combined Stem Cutter Assembly Check Valve
This combined stem cutter assembly check valve is a multifunctional component integrating pipeline modification and safety protection. Operable on pressurized water-filled pipelines without prior shutdown. Its top hexagonal connection port drives the built-in cutter to drill holes in pressurized main pipelines. The valve also prevents media backflow and eliminates air resistance in the pipeline. Achieving integrated operation of under-pressure tapping and one-way flow protection.
Model No.: JX-0877
Size: 1/2″, 3/4″
Material: Lead-free brass, bronze
Finishing: Sand-blasted, Rough brass
Working temperature: -10-110˚C
Spare Type: Compressor Kit
Medium: Air
Connection: NPT
Cast Brass Pipe Clamp
Application: Regulated Air Systems
2-year warranty
Wafer Type Single Disc Check Valve
This Wafer Type Single Disc Check Valve is a one-way flow protection part for large-diameter pipe systems. Its single valve core opens and closes automatically under medium pressure. It effectively stops the medium from flowing back in the pipe. It has a slim wafer body design. You can clamp the valve directly between two flanges. No extra-long pipe sections are needed for installation. It’s widely used for urban water supply and drainage networks, and also industrial circulating water systems.
This Brass Check Valve with Mesh Strainer has a one-piece cast brass body. It combines two functions in one: filtering out water impurities and stopping the medium from flowing back. It’s widely used at water pump inlets, the upstream of water heaters, faucet supply lines, and other home and small commercial pipe setups. It’s a practical accessory that boosts the operational safety of water supply systems and extends their service life.
Model No.: JX-0603
Size: 1/2″-2″
Straight-Through Type
Material: Brass, stainless steel
Seal material: EPDM
Max working pressure: 125psi
Connection: BSP
15 mesh stainless steel screen
Nitrile rubber seal
Temperatures from-20 ° C to 100°C
Ideal for drinking water applications
Standard: ANSI
Ball Check Valve
This Ball Check Valve is constructed from food-grade PP plastic and features quick-connect ports at both ends. For direct insertion into plastic pipelines, with no extra fittings required. Its internal ball valve core is automatically opened and closed by medium pressure. Effectively preventing media backflow in the pipeline. This valve is specifically designed for low-pressure applications, such as home water purification systems and small-scale irrigation systems.
Material: PP
Size: 1/2″, 3/4″
Connection: SxS
Seal material: FPM
EPDM O-ring
Socket end connection
Pressure rating: 150psi
Max service temperature: 180°F
Do not use or test with compressed air or other gases
Standard: ASTM
FAQs of Brass Hydraulic Safety Valve
1. What is a pressure limiting valve?
A Pressure Limiting Valve is a pressure-control valve used in hydraulic, plumbing, and fluid-conveying systems. Its core job is to limit system pressure to a preset, safe maximum.
If the system pressure exceeds the set value due to abnormal operating conditions, the valve opens automatically. It releases pressure or creates a bypass. This helps prevent safety risks such as pipeline ruptures and equipment damage.
It’s a key component for pressure protection. It makes sure fluid systems run safely.
From Southern design RV Ballarat
2. Is the pressure limiting valve’s core mechanism a diaphragm or a piston type?
Plumberstar pressure limiting valves use a piston-type structure design. When system pressure hits the preset value, the medium pressure pushes the piston up and compresses the spring. The valve then opens to release pressure. When the pressure drops back to a safe range, the spring resets. It drives the piston to close the valve port, providing stable, precise control of system pressure.
The piston-type structure has strong pressure-bearing capacity, good wear resistance, and great impact resistance. It’s especially suitable for water pressure or hydraulic systems—places where pressure often fluctuates and working conditions are complex.
We can also customize diaphragm-type pressure-limiting valve solutions for you based on your needs.
3. Does the pressure limiting valve comply with NSF/ANSI 61 for potable water safety?
Plumberstar pressure limiting valves fully meet NSF/ANSI 61 drinking water safety standards. They can be safely used in all kinds of drinking water systems.
For drinking water applications, the valve body is made of environmentally friendly brass that meets NSF/ANSI 61 requirements. Key parts in direct contact with the medium—such as valve cores, seals, diaphragms, and pistons—use compliant materials. These include food-grade rubber and lead-free sealing materials. This prevents water pollution from materials at the source.
We also provide the corresponding batch’s MTC material inspection certificates at no cost, ensuring material information is clear and traceable.
Finished products go through multiple cleaning and testing steps before leaving the factory. This ensures the internal flow channels of the valve body are clean and free of residues. All surface treatment processes comply with strict lead-free requirements. We don’t use lead-containing electroplating or spraying processes. This fully guarantees drinking water contact safety from the production side.
If you need, Plumberstar can provide copies of the NSF/ANSI 61 certification and related test reports. They’re delivered with the goods, meeting the requirements for drinking water engineering project acceptance, market access, and compliance reviews.
4. How to ensure machining surface accuracy for the pressure limiting valve?
As a professional valve factory, Plumberstar has a three-level inspection mechanism: self-inspection at each process, special inspection, and full inspection of finished products.
Self-inspection at each process: Our 120 operators finish a process, then check dimensional tolerances with calipers and micrometers. They also test the processing finish with surface roughness meters. This makes sure every single process is qualified.
Special inspection and review: Quality inspectors with over 10 years of experience do random re-inspections on key machined surfaces. If any abnormality is found, production stops immediately, and rectification begins. This stops unqualified products from moving to the next processes.
Full inspection of finished products: After all parts are processed, we use precision testing equipment, such as 2D image-measuring instruments. We conduct a full check on key dimensions and geometric tolerances. At the same time, we verify the sealing surface’s processing accuracy through air-tightness testing. Any product that doesn’t meet the standards is directly rejected.
Based on the ISO 9001 quality management system, we fully record all process data for pressure limiting valve machining. This includes processing parameters, inspection results, and batch information. If there are precision or assembly issues later, we can quickly identify the cause.
CNC workshop
5. Is a free sample of a pressure-limiting valve available?
Of course.
You just need to provide sample specs, working conditions, and delivery address to apply for samples.
Standard samples are free. You only need to cover the freight. If you need samples of multiple specs, large quantities, or customized ones, you just pay a small fee for raw materials and processing.
All samples use the same materials, craftsmanship, and production standards as bulk order products. They all undergo a comprehensive quality inspection before leaving the factory. We’ll send the corresponding quality inspection reports and MTC material certificates with the samples, making it easy for you to do performance evaluation and internal testing.
If you confirm and place a bulk order later, all costs for customized samples can be fully deducted from the official order payment.
6. Can we add our logo to the pressure limiting valve body?
Certainly.
You just need to provide a clear vector LOGO file in AI, PDF, or SVG format. Our engineers will confirm the engraving method, position, and size with you. They’ll also send an engraving rendering for your confirmation in the near future.
To make sure the valve body’s structural strength and sealing performance aren’t affected, we engrave the LOGO on a flat, non-stressed area by default. If you have a designated position or special requirements, we can adjust accordingly. We’ll send you a clear position diagram before processing. Production only starts after you confirm.
7. What makes Plumberstar a smarter long-term partner?
Choosing Plumberstar isn’t just picking a pressure-limiting valve supplier. It’s partnering with a manufacturer that brings long-term cooperation value.
We have deep expertise in pressure control and fluid systems. We understand the actual working conditions of pressure-limiting valves in water supply and drainage, heating, ventilation, and industrial applications. We don’t just produce drawings. We also help you optimize valve structures, pressure settings, and material solutions—all from the angle of system safety, pressure stability, and product service life. This cuts down risks in later use.
We use mature forging/precision casting, along with CNC precision machining. We strictly control key dimensions and sealing areas. All pressure-limiting valves undergo standardized pressure and function tests. This ensures consistent batch quality, avoiding after-sales costs from quality fluctuations.
We offer full implementation support for OEM/ODM projects. From pressure levels, interface types, and spring settings, to sealing materials, brand engraving, and packaging solutions. We help you create differentiated products while ensuring safety and compliance. This isn’t just simple OEM branding.
We value long-term trust more than short-term deals. We always focus on clear communication, stable delivery, controllable costs, and ongoing technical support. We start with cooperation on a single product, then grow with you to become your long-term, fluid-systems solution partner.
