The DORMA PH 689 Plunger Hold-Open Closer Arm is a complete replacement arm assembly designed for compatible DORMA 8600 and 8900 Series surface door closers. Featuring a mechanical plunger hold-open function, the PH arm is intended for regular-arm or top-jamb mounting with a 0" to 1-1/2" frame reveal on qualifying applications. The 689 Aluminum Painted (US28) finish coordinates with common commercial door closer hardware.

This component is ideal for commercial door closer repairs, replacements, and properly specified installations where a user-selectable hold-open function is required. The manufacturer identifies the PH configuration as a complete arm; the hydraulic closer body is not included.

Key Features & Benefits

• Plunger hold-open: Mechanical hold-open function allows the door to remain open at a selected position when properly adjusted and permitted by the opening requirements.
• Regular or top-jamb mounting: Designed for the specified regular-arm and top-jamb mounting arrangements.
• 0"–1-1/2" reveal: Manufacturer-listed reveal range for PH top-jamb applications.
• Commercial closer compatibility: Fits designated DORMA 8600 and 8900 Series surface door closers; verify the exact closer and mounting template.
• Non-handed arm: Suitable for compatible left-hand and right-hand door applications.
• 689 finish: Aluminum Painted, also known as US28.
• Complete arm assembly: Designed for replacement without purchasing a complete door closer if the existing closer body is serviceable.

Technical Specifications

PH vs. PHP vs. DST

• PH: Plunger hold-open arm for regular or top-jamb mounting with 0"–1-1/2" reveal. This product.
• PHP: Plunger hold-open arm for parallel or top-jamb mounting with 1-1/2"–3-1/2" reveal.
• DST: Door Saver cushioned parallel arm with thumb-turn hold-open. It is a different mounting and hold-open configuration.

Choose the exact arm identified in the applicable door closer template. These models should not be substituted for one another without verifying closer, frame and installation requirements.

Recommended Applications

• Commercial office buildings and storefront entrances
• Schools, colleges, and university facilities
• Healthcare and institutional buildings
• Industrial and warehouse pedestrian openings
• Commercial door closer maintenance and repair projects
• Compatible openings requiring manually selectable hold-open

Installation & Compatibility Notes

Confirm the installed door closer series, regular/top-jamb geometry, frame reveal, door handing, and mounting template before purchase. Adjust the hold-open mechanism according to manufacturer instructions. Do not use mechanical hold-open on fire-rated openings that are required to self-close and latch unless the complete installation uses a specifically approved, code-compliant arrangement.

What's Included: One PH 689 arm assembly. Not Included: Complete hydraulic door closer, separate accessories, or other hardware not explicitly supplied with the arm package.

Shipping Information

Shipping Method: Standard parcel shipment, typically UPS Ground where available based on location and packaged dimensions.

Package Quantity: One door closer arm assembly.

Packaging: Protective carton suitable for metal door hardware, with adequate protection against damage during transit.

Shipping Weight: A manufacturer-verified packaged shipping weight for PH 689 was not available. Warehouse measurement is required before setting the final Shopify shipping weight or purchasing a UPS label.

Carton Dimensions: Verify after packaging; the arm dimensions are not equivalent to carrier package dimensions.

Final shipping costs depend on the verified package weight, size, destination, and service selected at checkout. The hydraulic closer body is not included in the shipment.

Why Choose the DORMA PH 689?

The DORMA PH 689 is the manufacturer-specified replacement plunger hold-open arm for qualifying 8600/8900 Series regular and top-jamb installations with a 0"–1-1/2" reveal. It gives commercial door technicians and facility maintenance teams a practical way to restore hold-open operation without replacing an otherwise serviceable closer.

Model & Configuration Buying Guide

Product: DORMA PH 689 Plunger Hold-Open Arm – Regular / Top Jamb | Aluminum Painted. Manufacturer/distributor designation: dormakaba / DORMA. This product is part of the Door Closer Arm category and should be selected by its actual factory ordering code, intended application and installed door hardware. Use the exact SKU when placing a replacement or construction order.

Available SKUs and Configurations

The arm assembly must match the exact closer model, mounting location, door swing, frame reveal, and opening angle. A regular or top-jamb arm is not a substitute for a parallel arm or a stop/track arrangement. The model in this listing is an arm or arm kit; a complete hydraulic closer body is not included unless the existing description explicitly specifies otherwise.

Model-Specific Features

Check whether this model provides hold-open, non-hold-open, spring stop, cushioned Door Saver, plunger, or track operation. Use the exact product title and SKU when matching the existing arm to the door hardware schedule; physical mounting dimensions and compatible closer body series differ by arm family.

Installer and Replacement Checklist

1. Identify the existing closer body and confirm the named compatible 7000/8000, HD8000, or EHD9000 series as applicable.
2. Measure reveal and top-rail/soffit clearances; identify push-side vs pull-side mounting.
3. Check required fasteners, arm shoe, bracket, parallel plate, spindle/shaft and stop components before ordering.
4. Observe opening-angle limits and available frame clearance; confirm backcheck and door stop requirements for heavy-traffic doors.
5. Verify mechanical hold-open is permitted at the opening; fire-rated doors may require an approved automatic-release arrangement.
6. Retain a compatible closer's hydraulic adjustment schedule and follow current manufacturer installation instructions.

Commercial Door Worx Order Verification

Before purchasing, confirm the existing opening's required hardware function and ordered SKU, and verify the current manufacturer's mounting or wiring instructions. Separate installation, keying, operator integration, compliance, and accessories may be needed beyond the item described. Quantities, finish choices and selling prices are determined by the selected store variant.