Name: Custom Stainless Steel 304 316 Precision Casting Leakage Detection Shell Explosion Proof Instrument used in Coal Mine or Mining Site
Brand: jzcastings.com
Availability: InStock
Rating: 5 (1 reviews)

Description

Explosion-Proof Housing for Methane/Oil Vapor Leak Detection in Coal Mines

Designed for Safety in Hazardous Environments

Overview

This ATEX/IECEx-certified explosion-proof housing is engineered to protect gas detection sensors in underground coal mines, where methane (CH₄) and oil vapor leaks pose severe explosion risks. It ensures reliable operation in Zone 0/1/20/21 hazardous areas while complying with global safety standards, including IEC 60079, GB 3836, and MSHA (US).

Key Features

Dual Explosion Protection
- Ex ia I Ma (Intrinsic Safety) or Ex d I Mb (Flameproof) certified for煤矿瓦斯 (coal mine methane) environments.
- Withstands gas explosions with Group I (CH₄) and Group IIA/IIB (VOCs) compatibility.
High-Precision Gas Detection
- Integrates infrared (IR) or catalytic combustion sensors for real-time monitoring of:
  - Methane (CH₄): 0–100% LEL (±1% accuracy)
  - Oil Vapors (VOCs): 0–10,000 ppm (optional PID sensor)
- Fast response (T90 ≤ 30 sec) and low false alarms via temperature compensation.
Rugged & Reliable Design
- Material: 316L stainless steel (corrosion-resistant) or GFRP (lightweight).
- IP67 rating: Dustproof and waterproof (survives temporary immersion).
- Operating range: -20°C to +60°C (adapted for deep mine conditions).
Smart Connectivity
- 4–20 mA / RS485 (Modbus RTU) outputs for integration with SCADA systems.
- Optional wireless: LoRaWAN/NB-IoT for remote monitoring via cloud platforms.
Easy Maintenance
- Modular sensor slots for hot-swapping without powering down.
- Quick-release bolts and anti-corrosion terminals reduce downtime.

Applications

Longwall mining faces: Detect methane accumulation near shearers/conveyors.
Ventilation shafts: Monitor gas levels to ensure safe airflow.
Drilling sites: Alert operators to oil/gas leaks during coal seam gas extraction.

Certifications & Compliance

Standard	Scope
ATEX 2014/34/EU	EU market entry (Ex ia/Ex d certification).
IEC 60079-0/1/11	International explosion-proof design.
GB 3836	China’s national standard (equivalent to IEC).
MSHA	Optional US mine safety approval.

Why Choose This Product?

Safety First: Reduces explosion risks by 70%+ in high-risk mining zones.
Cost-Effective: Long lifespan (10+ years) with minimal maintenance.
Global Compliance: Single design meets diverse regulatory requirements.

"Protect your mine. Protect your team. Trust in explosion-proof technology."

Silica Sol Precision Casting Process

STEP 01

Wax Pattern Creation

Wax patterns are produced according to the customer’s CAD drawings or samples. This step determines the final dimensions, shape, and surface quality.

STEP 02

Shell Building with Silica Sol Slurry

The wax pattern is repeatedly dipped in a high-purity silica sol slurry and coated with refractory zircon sand, forming a strong ceramic shell.

STEP 03

Drying

Each layer is dried in a constant temperature and humidity environment to avoid cracks and ensure shell integrity.

STEP 04

Dewaxing & Shell Sintering

Wax is removed, and the ceramic shell is sintered at high temperature to achieve strength and dimensional stability.

STEP 05

Metal Pouring

Molten stainless steel 304, 316, carbon steel, alloy steel, or non-ferrous alloys are poured into the shell.

STEP 06

Shell Removal & Cleaning

The shell is broken away, and the raw casting is cleaned of any residual material.

STEP 07

Heat Treatment & Finishing

Heat treatments such as annealing, hardening, tempering, or surface hardening are applied to improve mechanical properties. Surface treatments like electropolishing or mirror polishing are available upon request.

Advantages of Silica Sol Investment Casting

· High Dimensional Accuracy – Tolerance grade CT4–CT6, ISO 8062 standards.
· Excellent Surface Finish – Ra 1.6–3.2 μm as-cast, Ra 0.8–3.2 μm after machining.
· Complex Shape Capability – Thin walls (0.5–0.8 mm) and intricate geometries.
· Material Versatility – Stainless steel, carbon steel, alloy steel, aluminum alloys, copper alloys.
· Reduced Machining – Near-net-shape production reduces post-processing time and cost.
· OEM & ODM Service – Fully customized according to drawings or samples.

Technical Specifications

Parameter	Specification
Materials	SS304 (CF8 / 1.4308), 304L (CF3), 316 (CF8M / 1.4408), 316L (CF3M / 1.4404 / 1.4409), WCB (1.0619), Carbon Steel #25/#35/#45, Alloy Steel, Aluminum Alloy, Copper Alloy
Casting Process	Silica Sol Precision Casting / Investment Casting / Lost-Wax Casting
Machining	CNC Machining Centers, CNC Lathes
Casting Tolerance	ISO 2768-mK, VDG P690 D1-D2, ISO 8062-3-2007 DCTG4-6, GCTG4-6
Casting Roughness	Ra 1.6–3.2 μm
Machining Tolerance	±0.005 mm, ISO 2768-f
Machining Roughness	Ra 0.8–3.2 μm
Weight Range	0.01–150 kg
Min. Wall Thickness	0.5–0.8 mm
Furnace Capacity	200 T
Finishing	Acid Passivation, Electropolishing, Mirror Polishing, Custom Surface Treatments
Heat Treatment	Annealing, Normalizing, Hardening, Tempering, Surface Hardening

Applications

Our silica sol precision castings are widely used in:
· Aerospace components
· Automotive parts & valve bodies
· Marine and shipbuilding hardware
· Medical instruments & surgical tools
· Industrial machinery & pump housings
· Agricultural machinery parts
· Architectural fittings & decorative hardware
· Pipe fittings & flanges
· OEM/ODM custom projects

Quality Assurance

Create leading brand of China foreign trade internet marketing outsourcing service

Get a Free Quotation Today

Send us your drawings or samples, and our engineering team will provide technical consultation, 3D modeling, and a competitive quotation within 24 hours.

Why Choose Us

32+ years

professional
industry production experience and
experienced R&D team and
international trade service team.

Attentive pre-sales

And after-sales service. timely
resolution of the customers'
problems.

Quality Assurance

Strict material
selection and quality inspection system.
strict QC system to guarantee the
superior quality. The best products
at the most reasonable price.

OEM&ODM Customisable

According to the customers' drawings
or products.we have experienced
techinicians to help you design
what you want.