Direct Buried Gate Valve

This direct buried gate valve is built for reliable, long-term performance in underground water and fire protection systems. Made from durable ductile iron with a resilient seal, it prevents leaks and holds up to constant use below ground. The non-rising stem and square drive cap make installation and operation simple, even in tight spaces. It’s a go-to choice for municipal waterworks and commercial fire safety projects.

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Product Introduction

Buried deep within pipeline networks, this underground gate valve acts as the core flow control unit for water and fire pipelines, managing fluid on-off with stable mechanical operation. Matched with the vertical indicator post installed above ground, the two work seamlessly as a set. The post connects to the valve stem, enabling surface operation to adjust the underground valve. It also delivers real-time open/closed status visibility, letting crews check and adjust valve conditions quickly without underground excavation.

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■ Installation

Site and Valve Preparation:Carefully check the whole valve and sealing parts for defects before installation. Clean pipeline flanges thoroughly and arrange the buried trench to create a stable construction environment.

Valve Connection and Fastening: Align the gate valve accurately with pipe flanges. Fasten bolts evenly in diagonal order to balance gasket pressure, prevent connection loosening and underground water seepage.

Backfilling and Pressure Testing: Backfill the trench in thin compacted layers to protect the valve from extrusion damage. Complete professional hydrostatic testing to check tightness and ensure stable leak-free performance.

■ Operation

Daily Operation Method: Rotate the valve stem clockwise for closing and counterclockwise for opening. Always operate gently to prevent water hammer and extend service life.

Cooperate with Indicator Post: Matched with a vertical indicator post, the buried valve can be controlled and checked on the ground directly, greatly simplifying daily inspection and emergency maintenance work.

Key Specifications

Item	Details
Valve Type	Resilient seated direct buried gate valve Compatible With Standard vertical indicator posts (various buried lengths)
Body Material	Ductile iron (GGG50 / ASTM A536)
Seat Material	EPDM
Stem Material	Stainless steel
Coating	Fusion-bonded epoxy (corrosion-resistant for underground use)
Stem Design	Non-rising stem (NRS)
Connection	Flanged end (ANSI standard)
Working Pressure	150LB
Operating Temp	-10°C to +80°C (standard water service)
Indicator Function	Clear open/closed visual indicator, lockable handle option
Standards Compliance	UL, CUL, FM, AWWA, and common waterworks codes

FAQ

01.Why use a vertical indicator post with this buried gate valve?

Since the valve stays underground, you can't check its position directly. The indicator post sits above ground and shows open/closed status at a glance, so you know exactly where the valve is without digging.

02.Are these valves compatible with all indicator posts?

They work with most standard vertical indicator posts. We can match the stem extension and connection to your post's specs for a seamless fit.

03.How long do these last underground?

The epoxy coating and resilient seat protect against corrosion and wear. With proper installation, they can last decades with minimal maintenance.

04.Can I operate the valve through the indicator post?

Yes, the post connects directly to the valve stem, so you can open/close the valve from ground level using the post's handle.

05.What maintenance do they need?

Just a quick visual check of the indicator post yearly, plus occasional operation to keep the valve working smoothly. No regular digging or disassembly needed.

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