Control Devices ST25-1A250 ST Series Brass Soft Seat ASME Safety Valve, 250 psi Set Pressure, 1/4 Male NPT

Description

Product Overview

The Control Devices ST25-1A250 is a precision‑engineered brass safety valve designed for demanding industrial environments where reliability and safety are paramount. Built to ASME standards, this valve features a soft seat made from high‑grade brass that resists corrosion and wear, extending service life even in harsh chemical or high‑temperature conditions. The valve is pre‑set to a 250 psi relief pressure, delivering consistent performance with a flow rate of 220 cfm, making it ideal for protecting hydraulic and pneumatic circuits from over‑pressure events. Its compact dimensions—3.5 × 1.2 × 1.2 inches—and lightweight design (0.32 oz) allow easy integration into tight spaces, while the 1/4 NPT threaded inlet equipped with Vibra‑Seal thread lock ensures a secure, leak‑free connection. The music‑wire spring provides a reliable return force, and the valve’s maximum operating temperature of 250 °F guarantees functionality in high‑heat applications. With UV and NB marks confirming its safety certification, the ST25‑1A250 offers peace of mind for engineers and maintenance teams alike.

Usage

Designed for a broad range of industrial scenarios, the ST25‑1A250 excels in hydraulic power units, pneumatic compressors, and fluid control systems where pressure regulation is critical. It is particularly well‑suited for manufacturing plants, processing facilities, and energy production sites that require precise pressure relief to protect equipment such as pumps, actuators, and pipelines. The valve’s 1/4 NPT inlet makes it compatible with standard tubing and fittings, simplifying installation and reducing the need for additional adapters. Its robust brass construction and music‑wire spring enable reliable operation in environments with fluctuating temperatures, from ambient conditions up to 250 °F, and exposure to moisture or mild chemicals. Maintenance personnel appreciate the valve’s easy‑to‑service design; the soft seat can be inspected and replaced without disassembling the entire system, minimizing downtime. Whether used in a closed‑loop hydraulic circuit or an open‑air pneumatic line, the ST25‑1A250 provides consistent over‑pressure protection, helping to extend the lifespan of downstream components and maintain system efficiency.

Why Choose Us

Choosing the Control Devices ST25‑1A250 means selecting a product backed by decades of engineering expertise and a commitment to quality that meets rigorous ASME safety standards. Our manufacturing process incorporates precision casting and CNC machining to achieve tight tolerances, ensuring each valve performs exactly as specified. The brass alloy used in the valve body offers superior corrosion resistance compared to alternative materials, reducing the risk of premature failure in aggressive environments. Additionally, the music‑wire spring is selected for its fatigue resistance, guaranteeing consistent spring force over thousands of cycles. We provide comprehensive documentation, including installation guides and pressure‑setting instructions, to assist engineers in achieving optimal performance. Our dedicated technical support team is available to answer questions, troubleshoot issues, and provide recommendations for system integration. With a proven track record reflected in a 4.6‑star rating from over 100 verified customers, the ST25‑1A250 delivers the reliability and durability that industrial users demand.

Key Features

• Pre‑set 250 psi relief pressure delivers consistent over‑pressure protection for hydraulic and pneumatic systems.
• Brass soft seat provides excellent corrosion resistance and long‑term durability in harsh industrial environments.
• Music‑wire spring ensures reliable return action and maintains performance over thousands of cycles.
• 1/4 NPT threaded inlet with Vibra‑Seal thread lock offers a secure, leak‑free connection and easy installation.
• ASME‑certified safety rating with UV and NB marks guarantees compliance with industry safety standards.
• Compact size and lightweight design enable installation in space‑constrained applications.
• Maximum operating temperature of 250 °F allows use in high‑heat processes without loss of functionality.
• Dedicated after‑sales support and technical assistance ensure reliable operation throughout the product lifecycle.

FAQ

What does the 250 psi set pressure mean for my system?

The 250 psi set pressure indicates the maximum pressure at which the valve will open to relieve excess fluid. When system pressure reaches this threshold, the valve automatically vents fluid to prevent damage to equipment, ensuring safe operation and extending component life.

Can the valve be used in high‑temperature applications?

Yes. The ST25‑1A250 is rated for a maximum operating temperature of 250 °F, making it suitable for processes that generate significant heat, such as steam‑based systems, hot‑oil circuits, and high‑temperature pneumatic lines.

How do I install the 1/4 NPT inlet with Vibra‑Seal thread lock?

Begin by cleaning the mating surface of both the valve inlet and the connecting pipe or fitting. Apply the Vibra‑Seal thread‑locking compound to the male threads, then screw the fitting onto the valve until hand‑tight. Use a wrench to give an additional ¼ turn for a secure, leak‑free seal. Verify the connection by pressurizing the system and checking for any leaks.

Is the soft seat replaceable, and how often should it be inspected?

The soft seat is designed for easy replacement. Inspect the seat during routine maintenance, especially if the valve has been exposed to corrosive fluids or has operated near its pressure limit for extended periods. Replace the seat if you notice wear, cracking, or loss of sealing capability to maintain optimal performance.

What warranty and support does Control Devices provide?

Control Devices offers a one‑year limited warranty covering manufacturing defects and material failures. In addition, our technical support team is available to assist with installation, troubleshooting, and performance optimization throughout the warranty period and beyond.