HTC Boiler Feed Pump Minimum Flow Control Valve 50mm 65mm 80mm 100mm Nominal

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Payment Terms	L/C, T/T
Supply Ability	5000 units per month for small parts. 1000 units per month for large parts
Delivery Time	7 - 15 days for small orders, 15 - 30 days for large orders
Packaging Details	Customized packaging to protect products
Type	Forged angle-type or "Z"-type valve body
Nominal pressure	ANSI 1500, 2500 or PN25, 32MPa
Nominal diameter	50, 65, 80, 100mm
Connection type	BW (butt weld)
Material	20# forged steel or stainless steel
Upper valve bonnet	Normal temperature type ≤350℃
Fluid direction	Inlet from upper side and outlet from bottom side, or inlet from upper side and outlet from bottom
Brand Name	WEYO
Model Number	HTC
Place of Origin	China

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Product Details
Company Details

Product Specification


Payment Terms	L/C, T/T	Supply Ability	5000 units per month for small parts. 1000 units per month for large parts
Delivery Time	7 - 15 days for small orders, 15 - 30 days for large orders	Packaging Details	Customized packaging to protect products
Type	Forged angle-type or "Z"-type valve body	Nominal pressure	ANSI 1500, 2500 or PN25, 32MPa
Nominal diameter	50, 65, 80, 100mm	Connection type	BW (butt weld)
Material	20# forged steel or stainless steel	Upper valve bonnet	Normal temperature type ≤350℃
Fluid direction	Inlet from upper side and outlet from bottom side, or inlet from upper side and outlet from bottom	Brand Name	WEYO
Model Number	HTC	Place of Origin	China
High Light	65mm Flow Control Valve ，50mm Flow Control Valve ，100mm pneumatic proportional control valve

The HTC boiler feed pump minimum flow control valve is a cavitation-preventing multi-stage throttling control valve, also known as a high-differential pressure control valve. It is a control valve with a novel structure, mainly used in the feed water system of large generator sets, and serves as an important device to prevent cavitation of the boiler feed pump.

The HTC minimum flow control valve has the following advantages:

The fluid is depressurized step by step, and its direction changes continuously, which increases the flow resistance and prevents cavitation when the pressure difference of the liquid flowing inside the valve reaches 24MPa.
The valve core features 4-stage throttling, and a throttling element is arranged on the lower side of the valve seat sealing surface to improve the fluid flow state, with the fluid velocity being around 30m/s.
The throttling surface is separated from the sealing surface. The surfaces of the valve core, valve core sleeve, valve core rod and throttling element are hardened to a hardness of approximately HRC70, ensuring tight closure and a long service life.
The surface of the valve core is provided with large notches, so even if the fluid contains solid particles such as 2-3mm welding slag, the valve core will not get stuck and can move flexibly.

Cv value and stroke
Nominal diameter (mm)	50	65	80	100
Cv value			12.9
Stroke	20			38
Note: The Cv values for nominal diameters of 50, 65, and 100mm can also be designed according to requirements.

Performance
Leakage: Conforms to ANSI B16.104 Class Ⅳ, less than 0.01% of the rated Cv
Allowable pressure difference: 24MPa

Structure diagram

Function of the Minimum Flow Control Valve in the Feed Water System:

When a feed water pump is started but its outlet valve is not yet opened, or when the external load is significantly reduced (unit operating at low load), the feed water flow is very small or even zero. At this time, only a small amount of water or no water at all passes through the pump. The frictional heat generated by the impeller cannot be carried away by the feed water, causing the temperature inside the pump to rise. When the temperature inside the pump exceeds the saturation temperature corresponding to the pressure at which the pump operates, the feed water will vaporize and cause cavitation. To prevent this phenomenon, it is necessary to open this minimum flow control valve when the feed water flow of the feed water pump decreases to a certain extent, allowing part of the feed water to return to the deaerator. In this way, sufficient water flows through the pump to prevent the temperature from rising and causing vaporization of the feed water pump. This minimum flow is generally 25% to 30% of the rated flow of the feed water pump.

A 125MW unit is equipped with two 100% capacity electric feed water pumps, one in operation and one as a standby.
A 200MW unit is configured with three 50% capacity electric feed water pumps, two in operation and one as a standby.
A 300MW unit is equipped with two 50% capacity pneumatic pumps for normal operation, and one electric feed water pump with a capacity not exceeding 50% as a standby, with the model DG-370-240.

Installation method
Install vertically. There are two ways for the relative position of the inlet pipe and the outlet pipe, as shown in the figure below.

Ordering Information

Model
Medium name and inlet temperature
Provide unit capacity, inlet pressure, and maximum flow rate
Pneumatic or electric actuator
Accessories
Relative position of inlet pipe and outlet pipe (choose either A or B)
Special requirements

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory



Business Type:

Manufacturer,Seller 


Year Established:

2003 


Total Annual:

141790014-161450000


Employee Number:

1000~1200 


Ecer Certification：

Verified Supplier 

High-End Die-Shanghai WEYO Automation Technology Co., Ltd. was established in 2021 and is headquartered in Shanghai. It is an innovative technology enterprise that specializes in high-end industrial automation equipment, core components supply, technical services, and solution provision. With the co... High-End Die-Shanghai WEYO Automation Technology Co., Ltd. was established in 2021 and is headquartered in Shanghai. It is an innovative technology enterprise that specializes in high-end industrial automation equipment, core components supply, technical services, and solution provision. With the co...

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https://www.industrial-valvesupply.com/

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