Low Pressure Bypass Valve

What is a low pressure bypass valve?

Low Pressure Bypass Valve, also known as Low pressure by-pass reducing control valve or lp bypass valve, is a steam pressure control valve, usually used in conjunction with power station gate valve, high and low pressure ball valve, butterfly valve, globe valve and other power plant valves.

The LP bypass valve connects the hot reheater in the bypass to the LP turbine with condenser. If the steam turbine is not running during start and stop, the steam generated in the reheater must be discharged to the turbine condenser through the medium pressure/low pressure bypass valve, bypassing the medium and low pressure steam turbine. The secondary injection cools the steam from the hot reheater sufficiently to ensure that the condenser does not suffer any damage.

Advantages of Low Pressure Bypass Valves

Pressure-controlled nozzles open sequentially for optimal cooling over the entire load range

Optimized spray angle and smallest droplet size

Compact design with control piston for reduced steam pressure

All wearing parts are field replaceable

Install muffler for low noise and low vibration operation

Suitable for high temperature applications

Dump tubes designed for specific applications are available

The working principle of the low pressure bypass valve:

Cooling water is sprayed through pressure-controlled nozzles according to the steam flow. According to the cooling water flow, the nozzle in the center opens first. The other nozzles open as the cooling water flow increases. Axially aligned nozzles in the steam flow ensure uniform temperature distribution in the exhaust pipe.

Design Features of Low Pressure Bypass Valves

Forged Welded Sleeve

Level adjustment, multi-level noise reduction

Holes and Noise Reduction

Special heat treatment and surface treatment of finished parts

Composite Packing Assembly

Manufacturing Scope of Low Pressure Bypass Valves

Diameter: 4"~32"

Pressure: ANSI 1500LB

Maximum temperature: 630°C

Forging material: A105, WB36, F11, F22, F91, F92

Operation mode: hydraulic, electric, pneumatic

Connection: Soldering

FAQ

Q1. Are sample orders acceptable?

A: Yes, of course.

Q2. What is your MOQ?

Answer: 1 piece.

Q3. What is the delivery time?

A: About 5-7 days after we receive payment.

Q4. How to pay?

A: We accept T/T, Paypal, Ali Trade Assurance.

Q5. Do you have products in stock?

Yes, some stock can be shipped within 3 days.

Q6. Do you test all shipments before delivery?

A: Yes, all products are fully inspected before delivery.

Q7. What is warranty?

A: Our warranty period is one year. After receiving the goods, if you find a defective product, just take a photo or video and send it to us. Once we confirm this is our responsibility, we will remake it to return it to the customer.

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