Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems
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Product Highlights
- External Pressure Adjustment: Fine-tune cracking pressure settings without disassembly to reduce maintenance downtime.
- Compact Space-Saving Design: Small body allows easy installation in tight spaces where traditional valves cannot fit.
- 100% Factory Tested: Guaranteed crack and reseal performance for reliable, leak-free operation.
- Lock Wire Capability: Ensures pressure relief settings remain secure and prevents accidental adjustments.
- Precision Flow Control: Optimized 4.8 mm orifice size ensures consistent pressure management.
- Versatile Pressure Options: Available in RV1 (15-225 psi) and RV2 (225-1500 psi) series with multiple spring types.
Product Attributes
- Customization
- Available
- Media
- Gas
- Material
- Stainless Steel
- Model NO.
- RVH
- Connection Form
- Thread
- Driving Mode
- Manual
- Nominal Pressure
- Compression
- Channel
- Straight Through Type
- Structure
- Floating Ball Valve
- Type
- Floating Ball Valve
- Function
- Relief Valve
- Temperature
- Low Temperature
- Standard
- Standard
- Application
- Industrial Usage, Water Industrial Usage, Gas, Indurstry
- Valve Style
- Relief Valve
- Port Size
- 1/4-1/2 Inch
- Body Material
- SS316/Hastolly
- Working Pressure
- RV1: 300psi
- Application Field
- Industrial Usage
- Keywords
- Relief Valve
- Seal
- Viton
- End Connection
- Female/ Male/ Nai-Lok Tube Fitting
- Handle
- Black Nylon/ Butterfly/ Lever
- Working Pressure RV
- RV2: 6000psi
- Spring Types
- Blue: 15-225psi; Yellow: 225-750psi;
- Transport Package
- Box Packing
- Specification
- 1/4''-1/2''
- Trademark
- NAI-LOK
- Origin
- China
- HS Code
- 8481300000
- Production Capacity
- 1000/Month
- Package Size
- 50.00cm * 45.00cm * 18.00cm
- Package Gross Weight
- 1.500kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems
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Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems -
Nai-Lok 1/4 Inch Female NPT Safety Relief Valve for High Pressure Systems
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Product Description
The NAI-LOK Relief Valve is a high-performance safety valve designed for applications requiring precise pressure control in confined spaces. Its compact design, external adjustability, and robust construction make it ideal for industries such as oil & gas, chemical processing, and power generation.
Key Features & Benefits
Space-Saving Design - Compact body allows easy installation in tight spaces where traditional relief valves cannot fit.
Externally Adjustable Cracking Pressure - Fine-tune pressure settings without disassembly, reducing maintenance downtime.
Lock Wire Capability - Ensures pressure relief settings remain secure, preventing accidental adjustments.
100% Factory Tested - Guaranteed crack and reseal performance for reliable, leak-free operation.
Wide Temperature Range - Operates reliably in extreme conditions (-23°C to 204°C / -10°F to 400°F).
Precision Orifice Size (4.8 mm / 0.19 in) - Optimized flow control for consistent pressure management.
Outlet Pressure Sensitivity - Cracking pressure adjusts based on downstream conditions for enhanced system safety.
| Product Name | RV Series Relief Valve |
| Cracking Pressure Range | RV1:15-225 psig / 1-155 bar to atmosphere RV2: 225-1500 psig /16-104 bar to atmosphere |
| Max working pressure | RV1: 300 psig /21 bar RV2: 6000 sig/414 bar |
| Spring Types | Blue:15-225 psig /1-15.5 bar Yellow.225-750 psig/15.5-51.5 bar Purple:750-1500 psig /51.5-104 bar |
NAI-LOK is the leader in flow control technology fields of manufacturers.
NAI-LOK`s target is challenge and beyond the technical limits, continuing pursuit becoming the industry leader. Since the
establishment, we have settled the developing direction of research and develop precise valve, regulator, fluid connectors and high-tech flow control system products.
NAI-LOK`s products are widely accepted and approved by the users on its safety and stability. The application filed covering semi-conductor industry, aero-space industry, solar power battery, petroleum and petrochemical industry, power energy,bio-pharmaceuticals industry and vacuum system, etc. NAI-LOK will keep moving and making unceasing progress in the high-tech flow control field and serve the customers sincerely.
Applications
-
Hydraulic & pneumatic systems
-
Process control equipment
-
Compressed gas storage
-
Refinery & petrochemical safety systems
Why Choose NAI-LOK?
Our relief valves are engineered for durability, precision, and safety, ensuring long-term performance even in demanding environments. With rigorous testing and high-quality materials, the NAI-LOK Relief Valve provides dependable overpressure protection while minimizing maintenance needs.
RV1 Series
-Cracking pressure Range:15-225psig to atmosphere
- Max working pressure: 300psig
- Operating Temperature Range: -10ºF to 400ºF(-23ºC to 204ºC)
- Orifice size:4.8mm(0.19in)
- Cracking pressure adjustable externally
- Lock wire capability to maintain pressure relief setting
- 100% factory tested crack and reseal performance
| Relief Valve Type | Industrial valve, instrumentation valve |
| Style | Forged,Casting |
| Size | Industrial valve DN15-DN150 Instrumentation valve: 1/4 to 1/2 inch |
| Cracking Pressure Range | RV1: 15-225 psi/ 1-15.5 bar to atmosphere RV2: 225-1500 psi/ 16-104 bar to atmosphere |
| Body Material | 316 Stainless Steel |
| Max. Working Pressure | RV1: 300 psi/ 21 bar RV2: 6000 psi/ 414 bar |
| Spring Types | Blue: 15-225 psi/ 1-15.5 bar Yellow: 225-750 psi/ 15.5-51.5 bar Purple: 750-1500 psi/ 15.5-104 bar |
Operating Temperature Range |
-10°F to 400°F(-23°C TO 204°C) |
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASI264759". Items marked "
" are certified.
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Company Profile
Established in 2000, NAI-LOK has made a name of itself in the list of top suppliers of in China. We focus on the production, research and development, sales of instrumentation valves and alloy valves. We have more than 20 years of precision valve manufacturing and 10 years of export experience.
Our strict control and management of the entire production process enables us to provide products that meet our customers' requirements for product safety, functionality and design at competitive prices, while ensuring the shortest lead times in the market.
We have the capability to manufacture and supply 4 different product categories, including:
1. General Instrumentation Valves and Fittings
2. High Purity & Ultra High Purity Products- NAI-LOK UHP PRODUCTS, Regulator, Bellows Valve, 3 PC high purity ball valve, Diaphragm Valve, Weld Fitting, Face seal Fitting, Gas Stick.
3. Hose & Tubing
4. Special Alloy Valves, fitting and tubings. Including material S31254 (6 Moly), Alloy 400, HC-276, C22, B3, Alloy 625, Duplex steel 2205 /2507 etc.
We hope there will be opportunities for cooperation.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- 397 Damuqiao Road, Shaxi Town, Taicang City, Suzhou, Jiangsu, China
-
Terms of Payment
- LC, T/T
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: one month -
Nearest Port
- Shanghai Port
-
Minimum Order Quantity
- 1 Piece
Our Production Capability & Technical Expertise
- Main Products
- Gas Delivery System, Ball Valve, Pressure Regulator, Alloy Valve, 2/3/5 Valve Manifold, Instrumentation Ball Valves, Sample Cylinder, Pipe & Tube Fittings, Needle Valve, Hose & Tubing
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
-
Repeat Buyers Choice
- 50%~80%
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015, ISO14001
FAQ
- Can the cracking pressure be adjusted?
- Yes, the cracking pressure is externally adjustable without disassembly, allowing for fine-tuning to reduce maintenance downtime.
- Is the valve suitable for high-pressure applications?
- Yes, the RV2 series supports a maximum working pressure of up to 6000 psi (414 bar).
- What customization options are available?
- We offer full customization, minor customization, and flexible customization from samples or designs, including port sizes from 1/4 to 1/2 inch.
- What is the minimum order quantity?
- The minimum order quantity is 1 piece.
- How long is the average lead time?
- Peak season lead time is within 15 workdays, while off-season lead time is one month.
- Are the valves tested before shipment?
- Yes, all valves undergo 100% factory inspection, including visual and function inspections, to guarantee performance.
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