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Floating Ball Valve Ball

Floating Ball Valve Ball With Vent Hole

Floating Ball Valve Ball With Vent Hole

The Floating Ball Valve Ball With Vent Hole is a custom-engineered floating valve ball featuring a precision-machined pressure relief hole that connects the valve cavity to the upstream side when the valve is in the closed position.

The vent hole is designed to help relieve cavity pressure caused by thermal expansion or vaporization of trapped media, reducing the risk of excessive internal pressure that may affect valve performance or sealing reliability.

This design is commonly specified for valves handling cryogenic liquids, heated process fluids, and other temperature-sensitive media where cavity pressure relief is required.

All valve balls are manufactured according to customer drawings and can be customized for different valve structures and operating conditions.


Basic Product Information

Product Type: Floating Ball Valve Ball With Vent Hole

Valve Structure: Floating Ball Valve

Special Feature: Precision Vent Hole for Cavity Pressure Relief

Manufacturing Method: CNC Precision Machining

Production Mode: OEM / Custom Manufacturing

Typical Applications: Cryogenic, Thermal Oil, Chemical & High-Pressure Process Systems

Inquiry
Nominal Size  1"-40”
Pressure Rating  150LB-2500LB
Base Material  F304/F316 F51 F53 718 MONEL400
Coating ENP/STL/NI60/WC


Valve Ball Selection Guide

Application Requirement

Standard Floating Ball

Floating Ball With Vent Hole

General industrial service

✓✓

Thermal expansion risk

✓✓

Cryogenic liquid service

✓✓

Heated process systems

✓✓

Cavity pressure relief required

✓✓

Directional installation acceptable

✓✓

Legend: ✓✓ Best Choice | ✓ Suitable | ○ Depending on Project Requirements | ✕ Not Recommended

Item

Specification

Ball Type

Floating Ball with Vent Hole

Flow Design

Full Bore Straight Through

Vent Hole Position

Upstream Side (Customizable per Drawing)

Standard Materials

F304, F316L, CF8, CF3M, F51, F53 ……

Special Materials

MONEL400, Inconel 718, LF2, C6022 ……

Surface Treatment

Mirror Polishing, ENP, WC Coating, Ni60 Coating, Overlay Welding ……

Manufacturing Method

CNC Precision Machining

Production Mode

OEM / Custom Manufacturing

About
Zhejiang Boshi Valve Technology Co., Ltd.

Zhejiang Boshi Valve Technology Co., Ltd was built initially in 2005. The company is located in the was built initially in 2005. The company is located in the No. 951, Jinhai Avenue, Yongxing Subdistrict, Longwan District, Wenzhou City, Zhejiang Province Building 25, 1st to 4th Floors. Boshi valve is a high tech valve ball supplier which integrates design, production, sales, and service. Our company provide high-quality products and services for customers at home and abroad.

 

Our products are backed by in-house facilities for roughcast forging and pressing, steel plate rolling and welding, seamless pipe forming, and CNC machining. Through a systematic, integrated, and process-driven management approach, we strictly control product quality and delivery schedules. As a result, we are highly praised and trusted by both new and long-term customers..

 

The materials produced and manufactured by our company include 2Cr13, A105, LF2, F316, F304, F51, and F53 include floating (Q41) balls, fixed (Q47) balls, three-way (T-shaped) balls, four-way balls, curved (L-shaped) balls, and V-shaped adjustment balls, special hard sealing balls, and marble or steel balls in various specifications, often using sub-arc welded hollow sleeves.

 

Surface treatments for spherical components include electroplating (ENP), ion TCC, and alloy spray coating (STL), ensuring high hardness, corrosion resistance, and wear resistance. The rough blanks undergo processes such as forging, casting, and coil welding, followed by heat treatments like solution treatment, annealing, tempering, normalizing, and quenching. We uphold the business philosophy of “quality first, integrity-based,” and continue to innovate with new technologies, new processes, and new materials to actively develop new product varieties.

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