Pneumatic-Manual Pressure Regulating Valve

I. Product Introduction

The pneumatic-manual pressure relief valve, also known as a pneumatic-manual pressure regulating valve, is a dedicated hydraulic pressure regulation valve for surface BOP (Blowout Preventer) control devices. Its core function is to control the annular BOP working pressure, reducing the accumulator output 21MPa (3000psi) high-pressure oil to 10.5MPa (1500psi) compatible working pressure. It also features built-in automatic overflow pressure relief, combining pressure reduction, pressure stabilization, and overflow multiple functions, suitable for drilling well control hydraulic energy storage system integration.

The matching self-operated pressure regulating valve is suitable for industrial automation pipeline pressure regulation. The valve body uses 4-20mA self-control signals to drive the valve core, changing the flow cross-sectional area between the valve body and seat, precisely controlling pipeline media flow, temperature, and pressure process parameters. The self-operated type requires no external power or air source, operating on the media kinetic energy, offering energy efficiency, environmental protection, and convenient installation. After on-site pressure setting, it can operate in full automatic pressure stabilization mode, suitable for low-pressure and energy-supply-deficient special conditions.

II. Working Principle

1. Pneumatic-Manual Pressure Relief Valve: Receives pneumatic and manual dual control power, connecting to the accumulator high-pressure oil circuit. Through valve core throttling pressure reduction, it constantly outputs low-pressure oil suitable for the annular BOP. When system pressure exceeds limits, it automatically overflows for pressure relief, stabilizing downstream actuator working pressure, suitable for well control equipment constant pressure regulation.

2. Self-Operated Pressure Regulating Valve: Relies on media pressure potential energy to drive the valve core, combined with self-control signals to adjust the valve port flow area, dynamically balancing pipeline inlet/outlet pressure, automatically compensating for pipeline pressure fluctuations. Requires no external electronic or pneumatic power source, achieving pipeline pressure autonomous closed-loop regulation.

III. Product Classification

1. Pneumatic-Manual Pressure Relief Valve: Pneumatic + manual dual control mode, customized for surface BOP control systems, suitable for accumulator high-pressure oil circuit pressure reduction and overflow, adaptable to well control dedicated oil pressure settings.

2. Self-Operated Pressure Regulating Valve: Source-free automatic pressure regulation type, suitable for general industrial fluid pipelines, adaptable to media self-driven pressure stabilization, suitable for power and air supply deficient work sites.

IV. Product Features

1. Dual control modes available, pneumatic remote regulation and manual on-site fine-tuning, suitable for well control equipment emergency and routine dual operating scenarios.

2. Precise pressure reduction set values, fixed adaptation for 21MPa to 10.5MPa well control standard oil pressure, stable pressure stabilization, suitable for annular BOP long-term operation.

3. Built-in overflow protection, automatic oil circuit overpressure relief, protecting BOP, accumulator, and downstream pipeline components from high-pressure overload damage.

4. Self-operated type source-free operation, no external power or air source needed, suitable for field drilling and remote factory areas with insufficient energy supply, convenient installation and maintenance.

5. Wide compatibility threshold, moderate pipeline control precision requirements, suitable for most industrial oil circuits and fluid pipeline pressure stabilization regulation.

6. Durable and reliable structure, excellent valve body pressure-bearing sealing, suitable for hydraulic oil and industrial fluid media, adaptable to high/low pressure alternating conditions.

V. Application Fields

Mainly used in oil drilling surface BOP control complete equipment, paired with energy storage accumulators to regulate BOP opening/closing oil pressure. Also widely used in oil and gas stations, chemical fluid pipelines, automated hydraulic stations, and field industrial and mining pipelines for media pressure autonomous regulation and oil circuit pressure reduction overflow operations, suitable for energy-supply-deficient field work sites.

VI. Usage Precautions

1. Selection must match system rated oil pressure and media type; choose pneumatic-manual or self-operated type based on on-site power and air supply conditions to match operating requirements.

2. Well control dedicated pressure regulating valves must not have their pressure reduction set values privately modified; must conform to BOP standard working pressure to ensure wellhead operational safety.

3. Install according to corresponding pipeline flow direction, connect oil circuits following valve body markings, properly control installation environment, and keep away from impurities and strong corrosive conditions.

4. Before putting self-operated pressure regulating valves into service, calibrate and set pressure values in advance, verify valve core flexibility, and ensure normal automatic pressure regulation function.

5. Regularly clean valve port impurities and oil contamination to prevent debris from jamming the valve core, affecting pressure reduction, overflow, and pressure regulation sensitivity.

6. In unstable power and air supply conditions, prioritize self-operated pressure regulating valves to reduce the impact of external energy fluctuations on pressure regulation accuracy.